Theorem lighneallem2 48613

Description: Lemma 2 for lighneal 48618. (Contributed by AV, 13-Aug-2021.)

Assertion

Ref	Expression
lighneallem2	⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 2 ∥ 𝑁 ∧ ((2↑𝑁) − 1) = (𝑃↑𝑀)) → 𝑀 = 1)

Proof of Theorem lighneallem2

Dummy variable 𝑘 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		evennn2n 16488	. . . 4 ⊢ (𝑁 ∈ ℕ → (2 ∥ 𝑁 ↔ ∃𝑘 ∈ ℕ (2 · 𝑘) = 𝑁))
2	1	3ad2ant3 1153	. . 3 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (2 ∥ 𝑁 ↔ ∃𝑘 ∈ ℕ (2 · 𝑘) = 𝑁))
3		oveq2 7416	. . . . . . . . 9 ⊢ (𝑁 = (2 · 𝑘) → (2↑𝑁) = (2↑(2 · 𝑘)))
4	3	eqcoms 2768	. . . . . . . 8 ⊢ ((2 · 𝑘) = 𝑁 → (2↑𝑁) = (2↑(2 · 𝑘)))
5		2cnd 12390	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℂ)
6		nncn 12312	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℂ)
7	5, 6	mulcomd 11301	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → (2 · 𝑘) = (𝑘 · 2))
8	7	oveq2d 7424	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (2↑(2 · 𝑘)) = (2↑(𝑘 · 2)))
9		2nn0 12592	. . . . . . . . . . . 12 ⊢ 2 ∈ ℕ0
10	9	a1i 11	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℕ0)
11		nnnn0 12582	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ0)
12	5, 10, 11	expmuld 14260	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (2↑(𝑘 · 2)) = ((2↑𝑘)↑2))
13	8, 12	eqtrd 2795	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (2↑(2 · 𝑘)) = ((2↑𝑘)↑2))
14	13	adantl 487	. . . . . . . 8 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (2↑(2 · 𝑘)) = ((2↑𝑘)↑2))
15	4, 14	sylan9eqr 2817	. . . . . . 7 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → (2↑𝑁) = ((2↑𝑘)↑2))
16	15	oveq1d 7423	. . . . . 6 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → ((2↑𝑁) − 1) = (((2↑𝑘)↑2) − 1))
17	16	eqeq1d 2762	. . . . 5 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → (((2↑𝑁) − 1) = (𝑃↑𝑀) ↔ (((2↑𝑘)↑2) − 1) = (𝑃↑𝑀)))
18		elnn1uz2 13021	. . . . . . . 8 ⊢ (𝑘 ∈ ℕ ↔ (𝑘 = 1 ∨ 𝑘 ∈ (ℤ≥‘2)))
19		oveq2 7416	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 1 → (2↑𝑘) = (2↑1))
20		2cn 12387	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℂ
21		exp1 14178	. . . . . . . . . . . . . . . . . 18 ⊢ (2 ∈ ℂ → (2↑1) = 2)
22	20, 21	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ (2↑1) = 2
23	19, 22	eqtrdi 2811	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 1 → (2↑𝑘) = 2)
24	23	oveq1d 7423	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 1 → ((2↑𝑘)↑2) = (2↑2))
25	24	oveq1d 7423	. . . . . . . . . . . . . 14 ⊢ (𝑘 = 1 → (((2↑𝑘)↑2) − 1) = ((2↑2) − 1))
26		sq2 14308	. . . . . . . . . . . . . . . 16 ⊢ (2↑2) = 4
27	26	oveq1i 7418	. . . . . . . . . . . . . . 15 ⊢ ((2↑2) − 1) = (4 − 1)
28		4m1e3 12440	. . . . . . . . . . . . . . 15 ⊢ (4 − 1) = 3
29	27, 28	eqtri 2783	. . . . . . . . . . . . . 14 ⊢ ((2↑2) − 1) = 3
30	25, 29	eqtrdi 2811	. . . . . . . . . . . . 13 ⊢ (𝑘 = 1 → (((2↑𝑘)↑2) − 1) = 3)
31	30	eqeq1d 2762	. . . . . . . . . . . 12 ⊢ (𝑘 = 1 → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ 3 = (𝑃↑𝑀)))
32	31	adantr 486	. . . . . . . . . . 11 ⊢ ((𝑘 = 1 ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ 3 = (𝑃↑𝑀)))
33		eqcom 2767	. . . . . . . . . . . . . 14 ⊢ (3 = (𝑃↑𝑀) ↔ (𝑃↑𝑀) = 3)
34		eldifi 4077	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℙ)
35		prmnn 16811	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℕ)
36		nnre 12311	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℕ → 𝑃 ∈ ℝ)
37	34, 35, 36	3syl 19	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℝ)
38	37	3ad2ant1 1151	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑃 ∈ ℝ)
39		nnnn0 12582	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℕ0)
40	39	3ad2ant2 1152	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℕ0)
41	38, 40	reexpcld 14274	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃↑𝑀) ∈ ℝ)
42	41	adantr 486	. . . . . . . . . . . . . . . 16 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) ∈ ℝ)
43		simpr 490	. . . . . . . . . . . . . . . 16 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) = 3)
44	42, 43	eqled 11384	. . . . . . . . . . . . . . 15 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) ≤ 3)
45	44	ex 418	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑃↑𝑀) = 3 → (𝑃↑𝑀) ≤ 3))
46	33, 45	biimtrid 245	. . . . . . . . . . . . 13 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (3 = (𝑃↑𝑀) → (𝑃↑𝑀) ≤ 3))
47	35	nnred 12319	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℝ)
48		prmgt1 16835	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ ℙ → 1 < 𝑃)
49	47, 48	jca 521	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ ℙ → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
50	34, 49	syl 18	. . . . . . . . . . . . . . . 16 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
51	50	3ad2ant1 1151	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
52		nnz 12683	. . . . . . . . . . . . . . . 16 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℤ)
53	52	3ad2ant2 1152	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℤ)
54		3rp 13095	. . . . . . . . . . . . . . . 16 ⊢ 3 ∈ ℝ+
55	54	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 3 ∈ ℝ+)
56		efexple 27571	. . . . . . . . . . . . . . 15 ⊢ (((𝑃 ∈ ℝ ∧ 1 < 𝑃) ∧ 𝑀 ∈ ℤ ∧ 3 ∈ ℝ+) → ((𝑃↑𝑀) ≤ 3 ↔ 𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃)))))
57	51, 53, 55, 56	syl3anc 1398	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑃↑𝑀) ≤ 3 ↔ 𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃)))))
58		oddprmge3 16838	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ (ℤ≥‘3))
59		eluzle 12947	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℤ≥‘3) → 3 ≤ 𝑃)
60	58, 59	syl 18	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 3 ≤ 𝑃)
61	54	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 3 ∈ ℝ+)
62		nnrp 13101	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℕ → 𝑃 ∈ ℝ+)
63	34, 35, 62	3syl 19	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℝ+)
64	61, 63	logled 26918	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (3 ≤ 𝑃 ↔ (log‘3) ≤ (log‘𝑃)))
65	60, 64	mpbid 235	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘3) ≤ (log‘𝑃))
66	65	3ad2ant1 1151	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (log‘3) ≤ (log‘𝑃))
67		relogcl 26866	. . . . . . . . . . . . . . . . . 18 ⊢ (3 ∈ ℝ+ → (log‘3) ∈ ℝ)
68	54, 67	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ (log‘3) ∈ ℝ
69		rplogcl 26895	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ∈ ℝ ∧ 1 < 𝑃) → (log‘𝑃) ∈ ℝ+)
70	34, 49, 69	3syl 19	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘𝑃) ∈ ℝ+)
71	70	3ad2ant1 1151	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (log‘𝑃) ∈ ℝ+)
72		divle1le 13161	. . . . . . . . . . . . . . . . 17 ⊢ (((log‘3) ∈ ℝ ∧ (log‘𝑃) ∈ ℝ+) → (((log‘3) / (log‘𝑃)) ≤ 1 ↔ (log‘3) ≤ (log‘𝑃)))
73	68, 71, 72	sylancr 599	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (((log‘3) / (log‘𝑃)) ≤ 1 ↔ (log‘3) ≤ (log‘𝑃)))
74	66, 73	mpbird 260	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((log‘3) / (log‘𝑃)) ≤ 1)
75		fldivle 13939	. . . . . . . . . . . . . . . . 17 ⊢ (((log‘3) ∈ ℝ ∧ (log‘𝑃) ∈ ℝ+) → (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃)))
76	68, 71, 75	sylancr 599	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃)))
77		nnre 12311	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℝ)
78	77	3ad2ant2 1152	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℝ)
79	68	a1i 11	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘3) ∈ ℝ)
80	62	relogcld 26914	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑃 ∈ ℕ → (log‘𝑃) ∈ ℝ)
81	34, 35, 80	3syl 19	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘𝑃) ∈ ℝ)
82	35	nnrpd 13131	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℝ+)
83		1red 11280	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑃 ∈ ℙ → 1 ∈ ℝ)
84	83, 48	gtned 11416	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑃 ∈ ℙ → 𝑃 ≠ 1)
85	82, 84	jca 521	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑃 ∈ ℙ → (𝑃 ∈ ℝ+ ∧ 𝑃 ≠ 1))
86		logne0 26870	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝑃 ∈ ℝ+ ∧ 𝑃 ≠ 1) → (log‘𝑃) ≠ 0)
87	34, 85, 86	3syl 19	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘𝑃) ≠ 0)
88	79, 81, 87	redivcld 12114	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((log‘3) / (log‘𝑃)) ∈ ℝ)
89	88	flcld 13906	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℤ)
90	89	zred 12772	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℝ)
91	90	3ad2ant1 1151	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℝ)
92	88	3ad2ant1 1151	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((log‘3) / (log‘𝑃)) ∈ ℝ)
93		letr 11375	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑀 ∈ ℝ ∧ (⌊‘((log‘3) / (log‘𝑃))) ∈ ℝ ∧ ((log‘3) / (log‘𝑃)) ∈ ℝ) → ((𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃))) ∧ (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃))) → 𝑀 ≤ ((log‘3) / (log‘𝑃))))
94	78, 91, 92, 93	syl3anc 1398	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃))) ∧ (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃))) → 𝑀 ≤ ((log‘3) / (log‘𝑃))))
95		1red 11280	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 1 ∈ ℝ)
96		letr 11375	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑀 ∈ ℝ ∧ ((log‘3) / (log‘𝑃)) ∈ ℝ ∧ 1 ∈ ℝ) → ((𝑀 ≤ ((log‘3) / (log‘𝑃)) ∧ ((log‘3) / (log‘𝑃)) ≤ 1) → 𝑀 ≤ 1))
97	78, 92, 95, 96	syl3anc 1398	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑀 ≤ ((log‘3) / (log‘𝑃)) ∧ ((log‘3) / (log‘𝑃)) ≤ 1) → 𝑀 ≤ 1))
98		nnge1 12335	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑀 ∈ ℕ → 1 ≤ 𝑀)
99		eqcom 2767	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑀 = 1 ↔ 1 = 𝑀)
100		1red 11280	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑀 ∈ ℕ → 1 ∈ ℝ)
101	100, 77	letri3d 11423	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑀 ∈ ℕ → (1 = 𝑀 ↔ (1 ≤ 𝑀 ∧ 𝑀 ≤ 1)))
102	99, 101	bitr2id 287	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑀 ∈ ℕ → ((1 ≤ 𝑀 ∧ 𝑀 ≤ 1) ↔ 𝑀 = 1))
103	102	biimpd 232	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑀 ∈ ℕ → ((1 ≤ 𝑀 ∧ 𝑀 ≤ 1) → 𝑀 = 1))
104	98, 103	mpand 708	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑀 ∈ ℕ → (𝑀 ≤ 1 → 𝑀 = 1))
105	104	3ad2ant2 1152	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 ≤ 1 → 𝑀 = 1))
106	97, 105	syld 48	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑀 ≤ ((log‘3) / (log‘𝑃)) ∧ ((log‘3) / (log‘𝑃)) ≤ 1) → 𝑀 = 1))
107	106	expd 421	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 ≤ ((log‘3) / (log‘𝑃)) → (((log‘3) / (log‘𝑃)) ≤ 1 → 𝑀 = 1)))
108	94, 107	syld 48	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃))) ∧ (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃))) → (((log‘3) / (log‘𝑃)) ≤ 1 → 𝑀 = 1)))
109	76, 108	mpan2d 707	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃))) → (((log‘3) / (log‘𝑃)) ≤ 1 → 𝑀 = 1)))
110	74, 109	mpid 45	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃))) → 𝑀 = 1))
111	57, 110	sylbid 243	. . . . . . . . . . . . 13 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑃↑𝑀) ≤ 3 → 𝑀 = 1))
112	46, 111	syld 48	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (3 = (𝑃↑𝑀) → 𝑀 = 1))
113	112	adantl 487	. . . . . . . . . . 11 ⊢ ((𝑘 = 1 ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (3 = (𝑃↑𝑀) → 𝑀 = 1))
114	32, 113	sylbid 243	. . . . . . . . . 10 ⊢ ((𝑘 = 1 ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
115	114	ex 418	. . . . . . . . 9 ⊢ (𝑘 = 1 → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
116		sq1 14306	. . . . . . . . . . . . . 14 ⊢ (1↑2) = 1
117	116	eqcomi 2769	. . . . . . . . . . . . 13 ⊢ 1 = (1↑2)
118	117	oveq2i 7419	. . . . . . . . . . . 12 ⊢ (((2↑𝑘)↑2) − 1) = (((2↑𝑘)↑2) − (1↑2))
119	118	eqeq1i 2765	. . . . . . . . . . 11 ⊢ ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ (((2↑𝑘)↑2) − (1↑2)) = (𝑃↑𝑀))
120		eqcom 2767	. . . . . . . . . . . 12 ⊢ ((((2↑𝑘)↑2) − (1↑2)) = (𝑃↑𝑀) ↔ (𝑃↑𝑀) = (((2↑𝑘)↑2) − (1↑2)))
121	9	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ (ℤ≥‘2) → 2 ∈ ℕ0)
122		eluzge2nn0 12988	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ (ℤ≥‘2) → 𝑘 ∈ ℕ0)
123	121, 122	nn0expcld 14357	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ (ℤ≥‘2) → (2↑𝑘) ∈ ℕ0)
124	123	adantr 486	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (2↑𝑘) ∈ ℕ0)
125		1nn0 12591	. . . . . . . . . . . . . . 15 ⊢ 1 ∈ ℕ0
126	125	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → 1 ∈ ℕ0)
127		1p1e2 12435	. . . . . . . . . . . . . . . . 17 ⊢ (1 + 1) = 2
128	22	eqcomi 2769	. . . . . . . . . . . . . . . . 17 ⊢ 2 = (2↑1)
129	127, 128	eqtri 2783	. . . . . . . . . . . . . . . 16 ⊢ (1 + 1) = (2↑1)
130		eluz2gt1 13016	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 < 𝑘)
131		2re 12386	. . . . . . . . . . . . . . . . . . 19 ⊢ 2 ∈ ℝ
132	131	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 2 ∈ ℝ)
133		1zzd 12696	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 ∈ ℤ)
134		eluzelz 12944	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 𝑘 ∈ ℤ)
135		1lt2 12484	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 < 2
136	135	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 < 2)
137	132, 133, 134, 136	ltexp2d 14362	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (ℤ≥‘2) → (1 < 𝑘 ↔ (2↑1) < (2↑𝑘)))
138	130, 137	mpbid 235	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ (ℤ≥‘2) → (2↑1) < (2↑𝑘))
139	129, 138	eqbrtrid 5139	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ (ℤ≥‘2) → (1 + 1) < (2↑𝑘))
140	139	adantr 486	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (1 + 1) < (2↑𝑘))
141	34, 39	anim12i 625	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
142	141	3adant3 1150	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
143	142	adantl 487	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
144		difsqpwdvds 17026	. . . . . . . . . . . . . 14 ⊢ ((((2↑𝑘) ∈ ℕ0 ∧ 1 ∈ ℕ0 ∧ (1 + 1) < (2↑𝑘)) ∧ (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0)) → ((𝑃↑𝑀) = (((2↑𝑘)↑2) − (1↑2)) → 𝑃 ∥ (2 · 1)))
145	124, 126, 140, 143, 144	syl31anc 1400	. . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((𝑃↑𝑀) = (((2↑𝑘)↑2) − (1↑2)) → 𝑃 ∥ (2 · 1)))
146		2t1e2 12474	. . . . . . . . . . . . . . . . . 18 ⊢ (2 · 1) = 2
147	146	breq2i 5110	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∥ (2 · 1) ↔ 𝑃 ∥ 2)
148		prmuz2 16833	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ (ℤ≥‘2))
149	34, 148	syl 18	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ (ℤ≥‘2))
150		2prm 16829	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℙ
151		dvdsprm 16841	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℤ≥‘2) ∧ 2 ∈ ℙ) → (𝑃 ∥ 2 ↔ 𝑃 = 2))
152	149, 150, 151	sylancl 598	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∥ 2 ↔ 𝑃 = 2))
153	147, 152	bitrid 286	. . . . . . . . . . . . . . . 16 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∥ (2 · 1) ↔ 𝑃 = 2))
154		eldifsn 4747	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ (ℙ ∖ {2}) ↔ (𝑃 ∈ ℙ ∧ 𝑃 ≠ 2))
155		eqneqall 2966	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 = 2 → (𝑃 ≠ 2 → 𝑀 = 1))
156	155	com12 33	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ≠ 2 → (𝑃 = 2 → 𝑀 = 1))
157	154, 156	simplbiim 514	. . . . . . . . . . . . . . . 16 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 = 2 → 𝑀 = 1))
158	153, 157	sylbid 243	. . . . . . . . . . . . . . 15 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∥ (2 · 1) → 𝑀 = 1))
159	158	3ad2ant1 1151	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∥ (2 · 1) → 𝑀 = 1))
160	159	adantl 487	. . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (𝑃 ∥ (2 · 1) → 𝑀 = 1))
161	145, 160	syld 48	. . . . . . . . . . . 12 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((𝑃↑𝑀) = (((2↑𝑘)↑2) − (1↑2)) → 𝑀 = 1))
162	120, 161	biimtrid 245	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((((2↑𝑘)↑2) − (1↑2)) = (𝑃↑𝑀) → 𝑀 = 1))
163	119, 162	biimtrid 245	. . . . . . . . . 10 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
164	163	ex 418	. . . . . . . . 9 ⊢ (𝑘 ∈ (ℤ≥‘2) → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
165	115, 164	jaoi 871	. . . . . . . 8 ⊢ ((𝑘 = 1 ∨ 𝑘 ∈ (ℤ≥‘2)) → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
166	18, 165	sylbi 220	. . . . . . 7 ⊢ (𝑘 ∈ ℕ → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
167	166	impcom 413	. . . . . 6 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
168	167	adantr 486	. . . . 5 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
169	17, 168	sylbid 243	. . . 4 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → (((2↑𝑁) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
170	169	rexlimdva2 3165	. . 3 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (∃𝑘 ∈ ℕ (2 · 𝑘) = 𝑁 → (((2↑𝑁) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
171	2, 170	sylbid 243	. 2 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (2 ∥ 𝑁 → (((2↑𝑁) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
172	171	3imp 1128	1 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 2 ∥ 𝑁 ∧ ((2↑𝑁) − 1) = (𝑃↑𝑀)) → 𝑀 = 1)

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   ∨ wo 861   ∧ w3a 1103   = wceq 1570   ∈ wcel 2145   ≠ wne 2955  ∃wrex 3086   ∖ cdif 3895  {csn 4583   class class class wbr 5102  ‘cfv 6527  (class class class)co 7408  ℂcc 11169  ℝcr 11170  0cc0 11171  1c1 11172   + caddc 11174   · cmul 11176   < clt 11314   ≤ cle 11315   − cmin 11512   / cdiv 11942  ℕcn 12304  2c2 12366  3c3 12367  4c4 12368  ℕ₀cn0 12575  ℤcz 12662  ℤ_≥cuz 12934  ℝ⁺crp 13089  ⌊cfl 13898  ↑cexp 14172   ∥ cdvds 16389  ℙcprime 16808  logclog 26845

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-rep 5231  ax-sep 5248  ax-nul 5259  ax-pow 5326  ax-pr 5390  ax-un 7734  ax-inf2 9620  ax-cnex 11227  ax-resscn 11228  ax-1cn 11229  ax-icn 11230  ax-addcl 11231  ax-addrcl 11232  ax-mulcl 11233  ax-mulrcl 11234  ax-mulcom 11235  ax-addass 11236  ax-mulass 11237  ax-distr 11238  ax-i2m1 11239  ax-1ne0 11240  ax-1rid 11241  ax-rnegex 11242  ax-rrecex 11243  ax-cnre 11244  ax-pre-lttri 11245  ax-pre-lttrn 11246  ax-pre-ltadd 11247  ax-pre-mulgt0 11248  ax-pre-sup 11249  ax-addf 11250

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-nel 3062  df-ral 3077  df-rex 3087  df-rmo 3365  df-reu 3366  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-pss 3918  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-tp 4588  df-op 4590  df-uni 4867  df-int 4907  df-iun 4952  df-iin 4953  df-br 5103  df-opab 5167  df-mpt 5186  df-tr 5212  df-id 5542  df-eprel 5547  df-po 5555  df-so 5556  df-fr 5600  df-se 5601  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ima 5660  df-pred 6293  df-ord 6354  df-on 6355  df-lim 6356  df-suc 6357  df-iota 6483  df-fun 6529  df-fn 6530  df-f 6531  df-f1 6532  df-fo 6533  df-f1o 6534  df-fv 6535  df-isom 6536  df-riota 7365  df-ov 7411  df-oprab 7412  df-mpo 7413  df-of 7676  df-om 7861  df-1st 7984  df-2nd 7985  df-supp 8156  df-frecs 8277  df-wrecs 8308  df-recs 8357  df-rdg 8396  df-1o 8454  df-2o 8455  df-er 8695  df-map 8827  df-pm 8828  df-ixp 8904  df-en 8952  df-dom 8953  df-sdom 8954  df-fin 8955  df-fsupp 9332  df-fi 9381  df-sup 9412  df-inf 9413  df-oi 9482  df-card 9991  df-pnf 11316  df-mnf 11317  df-xr 11318  df-ltxr 11319  df-le 11320  df-sub 11514  df-neg 11515  df-div 11943  df-nn 12305  df-2 12374  df-3 12375  df-4 12376  df-5 12377  df-6 12378  df-7 12379  df-8 12380  df-9 12381  df-n0 12576  df-z 12663  df-dec 12784  df-uz 12935  df-q 13045  df-rp 13090  df-xneg 13210  df-xadd 13211  df-xmul 13212  df-ioo 13449  df-ioc 13450  df-ico 13451  df-icc 13452  df-fz 13609  df-fzo 13757  df-fl 13900  df-mod 13978  df-seq 14113  df-exp 14173  df-fac 14385  df-bc 14414  df-hash 14442  df-shft 15187  df-cj 15233  df-re 15234  df-im 15235  df-sqrt 15369  df-abs 15370  df-limsup 15605  df-clim 15622  df-rlim 15623  df-sum 15821  df-ef 16200  df-sin 16202  df-cos 16203  df-pi 16205  df-dvds 16390  df-gcd 16632  df-prm 16809  df-pc 16976  df-struct 17286  df-sets 17303  df-slot 17321  df-ndx 17333  df-base 17349  df-ress 17370  df-plusg 17402  df-mulr 17403  df-starv 17404  df-sca 17405  df-vsca 17406  df-ip 17407  df-tset 17408  df-ple 17409  df-ds 17411  df-unif 17412  df-hom 17413  df-cco 17414  df-rest 17554  df-topn 17555  df-0g 17573  df-gsum 17574  df-topgen 17575  df-pt 17576  df-prds 17579  df-xrs 17635  df-qtop 17640  df-imas 17641  df-xps 17643  df-mre 17717  df-mrc 17718  df-acs 17720  df-mgm 18777  df-sgrp 18869  df-mnd 18885  df-submnd 18940  df-mulg 19239  df-cntz 19492  df-cmn 19957  df-psmet 21631  df-xmet 21632  df-met 21633  df-bl 21634  df-mopn 21635  df-fbas 21636  df-fg 21637  df-cnfld 21640  df-top 23173  df-topon 23190  df-topsp 23212  df-bases 23225  df-cld 23298  df-ntr 23299  df-cls 23300  df-nei 23377  df-lp 23415  df-perf 23416  df-cn 23506  df-cnp 23507  df-haus 23594  df-tx 23842  df-hmeo 24035  df-fil 24126  df-fm 24218  df-flim 24219  df-flf 24220  df-xms 24600  df-ms 24601  df-tms 24602  df-cncf 25160  df-limc 26147  df-dv 26148  df-log 26847

This theorem is used by:  lighneal  48618