Theorem lighneallem2 48303

Description: Lemma 2 for lighneal 48308. (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 16408	. . . 4 ⊢ (𝑁 ∈ ℕ → (2 ∥ 𝑁 ↔ ∃𝑘 ∈ ℕ (2 · 𝑘) = 𝑁))
2	1	3ad2ant3 1151	. . 3 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (2 ∥ 𝑁 ↔ ∃𝑘 ∈ ℕ (2 · 𝑘) = 𝑁))
3		oveq2 7418	. . . . . . . . 9 ⊢ (𝑁 = (2 · 𝑘) → (2↑𝑁) = (2↑(2 · 𝑘)))
4	3	eqcoms 2769	. . . . . . . 8 ⊢ ((2 · 𝑘) = 𝑁 → (2↑𝑁) = (2↑(2 · 𝑘)))
5		2cnd 12318	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℂ)
6		nncn 12240	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℂ)
7	5, 6	mulcomd 11229	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → (2 · 𝑘) = (𝑘 · 2))
8	7	oveq2d 7426	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (2↑(2 · 𝑘)) = (2↑(𝑘 · 2)))
9		2nn0 12520	. . . . . . . . . . . 12 ⊢ 2 ∈ ℕ0
10	9	a1i 11	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 2 ∈ ℕ0)
11		nnnn0 12510	. . . . . . . . . . 11 ⊢ (𝑘 ∈ ℕ → 𝑘 ∈ ℕ0)
12	5, 10, 11	expmuld 14184	. . . . . . . . . 10 ⊢ (𝑘 ∈ ℕ → (2↑(𝑘 · 2)) = ((2↑𝑘)↑2))
13	8, 12	eqtrd 2796	. . . . . . . . 9 ⊢ (𝑘 ∈ ℕ → (2↑(2 · 𝑘)) = ((2↑𝑘)↑2))
14	13	adantl 486	. . . . . . . 8 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → (2↑(2 · 𝑘)) = ((2↑𝑘)↑2))
15	4, 14	sylan9eqr 2818	. . . . . . 7 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → (2↑𝑁) = ((2↑𝑘)↑2))
16	15	oveq1d 7425	. . . . . 6 ⊢ ((((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) ∧ (2 · 𝑘) = 𝑁) → ((2↑𝑁) − 1) = (((2↑𝑘)↑2) − 1))
17	16	eqeq1d 2763	. . . . 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 12948	. . . . . . . 8 ⊢ (𝑘 ∈ ℕ ↔ (𝑘 = 1 ∨ 𝑘 ∈ (ℤ≥‘2)))
19		oveq2 7418	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 = 1 → (2↑𝑘) = (2↑1))
20		2cn 12315	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℂ
21		exp1 14102	. . . . . . . . . . . . . . . . . 18 ⊢ (2 ∈ ℂ → (2↑1) = 2)
22	20, 21	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ (2↑1) = 2
23	19, 22	eqtrdi 2812	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 = 1 → (2↑𝑘) = 2)
24	23	oveq1d 7425	. . . . . . . . . . . . . . 15 ⊢ (𝑘 = 1 → ((2↑𝑘)↑2) = (2↑2))
25	24	oveq1d 7425	. . . . . . . . . . . . . 14 ⊢ (𝑘 = 1 → (((2↑𝑘)↑2) − 1) = ((2↑2) − 1))
26		sq2 14232	. . . . . . . . . . . . . . . 16 ⊢ (2↑2) = 4
27	26	oveq1i 7420	. . . . . . . . . . . . . . 15 ⊢ ((2↑2) − 1) = (4 − 1)
28		4m1e3 12368	. . . . . . . . . . . . . . 15 ⊢ (4 − 1) = 3
29	27, 28	eqtri 2784	. . . . . . . . . . . . . 14 ⊢ ((2↑2) − 1) = 3
30	25, 29	eqtrdi 2812	. . . . . . . . . . . . 13 ⊢ (𝑘 = 1 → (((2↑𝑘)↑2) − 1) = 3)
31	30	eqeq1d 2763	. . . . . . . . . . . 12 ⊢ (𝑘 = 1 → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ 3 = (𝑃↑𝑀)))
32	31	adantr 485	. . . . . . . . . . 11 ⊢ ((𝑘 = 1 ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ 3 = (𝑃↑𝑀)))
33		eqcom 2768	. . . . . . . . . . . . . 14 ⊢ (3 = (𝑃↑𝑀) ↔ (𝑃↑𝑀) = 3)
34		eldifi 4084	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℙ)
35		prmnn 16731	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℕ)
36		nnre 12239	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℕ → 𝑃 ∈ ℝ)
37	34, 35, 36	3syl 19	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℝ)
38	37	3ad2ant1 1149	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑃 ∈ ℝ)
39		nnnn0 12510	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℕ0)
40	39	3ad2ant2 1150	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℕ0)
41	38, 40	reexpcld 14198	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃↑𝑀) ∈ ℝ)
42	41	adantr 485	. . . . . . . . . . . . . . . 16 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) ∈ ℝ)
43		simpr 489	. . . . . . . . . . . . . . . 16 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) = 3)
44	42, 43	eqled 11312	. . . . . . . . . . . . . . 15 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ (𝑃↑𝑀) = 3) → (𝑃↑𝑀) ≤ 3)
45	44	ex 417	. . . . . . . . . . . . . 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 12247	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℝ)
48		prmgt1 16755	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ ℙ → 1 < 𝑃)
49	47, 48	jca 520	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ ℙ → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
50	34, 49	syl 18	. . . . . . . . . . . . . . . 16 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
51	50	3ad2ant1 1149	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∈ ℝ ∧ 1 < 𝑃))
52		nnz 12611	. . . . . . . . . . . . . . . 16 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℤ)
53	52	3ad2ant2 1150	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℤ)
54		3rp 13021	. . . . . . . . . . . . . . . 16 ⊢ 3 ∈ ℝ+
55	54	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 3 ∈ ℝ+)
56		efexple 27421	. . . . . . . . . . . . . . 15 ⊢ (((𝑃 ∈ ℝ ∧ 1 < 𝑃) ∧ 𝑀 ∈ ℤ ∧ 3 ∈ ℝ+) → ((𝑃↑𝑀) ≤ 3 ↔ 𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃)))))
57	51, 53, 55, 56	syl3anc 1396	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑃↑𝑀) ≤ 3 ↔ 𝑀 ≤ (⌊‘((log‘3) / (log‘𝑃)))))
58		oddprmge3 16758	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ (ℤ≥‘3))
59		eluzle 12874	. . . . . . . . . . . . . . . . . . 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 13027	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ ℕ → 𝑃 ∈ ℝ+)
63	34, 35, 62	3syl 19	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℝ+)
64	61, 63	logled 26768	. . . . . . . . . . . . . . . . . 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 1149	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (log‘3) ≤ (log‘𝑃))
67		relogcl 26716	. . . . . . . . . . . . . . . . . 18 ⊢ (3 ∈ ℝ+ → (log‘3) ∈ ℝ)
68	54, 67	ax-mp 5	. . . . . . . . . . . . . . . . 17 ⊢ (log‘3) ∈ ℝ
69		rplogcl 26745	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ∈ ℝ ∧ 1 < 𝑃) → (log‘𝑃) ∈ ℝ+)
70	34, 49, 69	3syl 19	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘𝑃) ∈ ℝ+)
71	70	3ad2ant1 1149	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (log‘𝑃) ∈ ℝ+)
72		divle1le 13087	. . . . . . . . . . . . . . . . 17 ⊢ (((log‘3) ∈ ℝ ∧ (log‘𝑃) ∈ ℝ+) → (((log‘3) / (log‘𝑃)) ≤ 1 ↔ (log‘3) ≤ (log‘𝑃)))
73	68, 71, 72	sylancr 598	. . . . . . . . . . . . . . . 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 13863	. . . . . . . . . . . . . . . . 17 ⊢ (((log‘3) ∈ ℝ ∧ (log‘𝑃) ∈ ℝ+) → (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃)))
76	68, 71, 75	sylancr 598	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (⌊‘((log‘3) / (log‘𝑃))) ≤ ((log‘3) / (log‘𝑃)))
77		nnre 12239	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑀 ∈ ℕ → 𝑀 ∈ ℝ)
78	77	3ad2ant2 1150	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 𝑀 ∈ ℝ)
79	68	a1i 11	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘3) ∈ ℝ)
80	62	relogcld 26764	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑃 ∈ ℕ → (log‘𝑃) ∈ ℝ)
81	34, 35, 80	3syl 19	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (log‘𝑃) ∈ ℝ)
82	35	nnrpd 13057	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℝ+)
83		1red 11208	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑃 ∈ ℙ → 1 ∈ ℝ)
84	83, 48	gtned 11344	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑃 ∈ ℙ → 𝑃 ≠ 1)
85	82, 84	jca 520	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑃 ∈ ℙ → (𝑃 ∈ ℝ+ ∧ 𝑃 ≠ 1))
86		logne0 26720	. . . . . . . . . . . . . . . . . . . . . . 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 12042	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((log‘3) / (log‘𝑃)) ∈ ℝ)
89	88	flcld 13830	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℤ)
90	89	zred 12699	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℝ)
91	90	3ad2ant1 1149	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (⌊‘((log‘3) / (log‘𝑃))) ∈ ℝ)
92	88	3ad2ant1 1149	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((log‘3) / (log‘𝑃)) ∈ ℝ)
93		letr 11303	. . . . . . . . . . . . . . . . . 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 1396	. . . . . . . . . . . . . . . . 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 11208	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → 1 ∈ ℝ)
96		letr 11303	. . . . . . . . . . . . . . . . . . . 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 1396	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((𝑀 ≤ ((log‘3) / (log‘𝑃)) ∧ ((log‘3) / (log‘𝑃)) ≤ 1) → 𝑀 ≤ 1))
98		nnge1 12263	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑀 ∈ ℕ → 1 ≤ 𝑀)
99		eqcom 2768	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑀 = 1 ↔ 1 = 𝑀)
100		1red 11208	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑀 ∈ ℕ → 1 ∈ ℝ)
101	100, 77	letri3d 11351	. . . . . . . . . . . . . . . . . . . . . . 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 707	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑀 ∈ ℕ → (𝑀 ≤ 1 → 𝑀 = 1))
105	104	3ad2ant2 1150	. . . . . . . . . . . . . . . . . . 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 420	. . . . . . . . . . . . . . . . 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 706	. . . . . . . . . . . . . . 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 486	. . . . . . . . . . 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 417	. . . . . . . . 9 ⊢ (𝑘 = 1 → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
116		sq1 14230	. . . . . . . . . . . . . 14 ⊢ (1↑2) = 1
117	116	eqcomi 2770	. . . . . . . . . . . . 13 ⊢ 1 = (1↑2)
118	117	oveq2i 7421	. . . . . . . . . . . 12 ⊢ (((2↑𝑘)↑2) − 1) = (((2↑𝑘)↑2) − (1↑2))
119	118	eqeq1i 2766	. . . . . . . . . . 11 ⊢ ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) ↔ (((2↑𝑘)↑2) − (1↑2)) = (𝑃↑𝑀))
120		eqcom 2768	. . . . . . . . . . . 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 12915	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ (ℤ≥‘2) → 𝑘 ∈ ℕ0)
123	121, 122	nn0expcld 14281	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ (ℤ≥‘2) → (2↑𝑘) ∈ ℕ0)
124	123	adantr 485	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (2↑𝑘) ∈ ℕ0)
125		1nn0 12519	. . . . . . . . . . . . . . 15 ⊢ 1 ∈ ℕ0
126	125	a1i 11	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → 1 ∈ ℕ0)
127		1p1e2 12363	. . . . . . . . . . . . . . . . 17 ⊢ (1 + 1) = 2
128	22	eqcomi 2770	. . . . . . . . . . . . . . . . 17 ⊢ 2 = (2↑1)
129	127, 128	eqtri 2784	. . . . . . . . . . . . . . . 16 ⊢ (1 + 1) = (2↑1)
130		eluz2gt1 12943	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 < 𝑘)
131		2re 12314	. . . . . . . . . . . . . . . . . . 19 ⊢ 2 ∈ ℝ
132	131	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 2 ∈ ℝ)
133		1zzd 12624	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 ∈ ℤ)
134		eluzelz 12871	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 𝑘 ∈ ℤ)
135		1lt2 12412	. . . . . . . . . . . . . . . . . . 19 ⊢ 1 < 2
136	135	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑘 ∈ (ℤ≥‘2) → 1 < 2)
137	132, 133, 134, 136	ltexp2d 14286	. . . . . . . . . . . . . . . . 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 5145	. . . . . . . . . . . . . . 15 ⊢ (𝑘 ∈ (ℤ≥‘2) → (1 + 1) < (2↑𝑘))
140	139	adantr 485	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (1 + 1) < (2↑𝑘))
141	34, 39	anim12i 624	. . . . . . . . . . . . . . . 16 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
142	141	3adant3 1148	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
143	142	adantl 486	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → (𝑃 ∈ ℙ ∧ 𝑀 ∈ ℕ0))
144		difsqpwdvds 16946	. . . . . . . . . . . . . 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 1398	. . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ (ℤ≥‘2) ∧ (𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ)) → ((𝑃↑𝑀) = (((2↑𝑘)↑2) − (1↑2)) → 𝑃 ∥ (2 · 1)))
146		2t1e2 12402	. . . . . . . . . . . . . . . . . 18 ⊢ (2 · 1) = 2
147	146	breq2i 5116	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∥ (2 · 1) ↔ 𝑃 ∥ 2)
148		prmuz2 16753	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ (ℤ≥‘2))
149	34, 148	syl 18	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ (ℤ≥‘2))
150		2prm 16749	. . . . . . . . . . . . . . . . . 18 ⊢ 2 ∈ ℙ
151		dvdsprm 16761	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑃 ∈ (ℤ≥‘2) ∧ 2 ∈ ℙ) → (𝑃 ∥ 2 ↔ 𝑃 = 2))
152	149, 150, 151	sylancl 597	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∥ 2 ↔ 𝑃 = 2))
153	147, 152	bitrid 286	. . . . . . . . . . . . . . . 16 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → (𝑃 ∥ (2 · 1) ↔ 𝑃 = 2))
154		eldifsn 4752	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ∈ (ℙ ∖ {2}) ↔ (𝑃 ∈ ℙ ∧ 𝑃 ≠ 2))
155		eqneqall 2967	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑃 = 2 → (𝑃 ≠ 2 → 𝑀 = 1))
156	155	com12 33	. . . . . . . . . . . . . . . . 17 ⊢ (𝑃 ≠ 2 → (𝑃 = 2 → 𝑀 = 1))
157	154, 156	simplbiim 513	. . . . . . . . . . . . . . . 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 1149	. . . . . . . . . . . . . 14 ⊢ ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → (𝑃 ∥ (2 · 1) → 𝑀 = 1))
160	159	adantl 486	. . . . . . . . . . . . 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 417	. . . . . . . . 9 ⊢ (𝑘 ∈ (ℤ≥‘2) → ((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1)))
165	115, 164	jaoi 870	. . . . . . . 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 412	. . . . . 6 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 𝑘 ∈ ℕ) → ((((2↑𝑘)↑2) − 1) = (𝑃↑𝑀) → 𝑀 = 1))
168	167	adantr 485	. . . . 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 3166	. . 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 1126	1 ⊢ (((𝑃 ∈ (ℙ ∖ {2}) ∧ 𝑀 ∈ ℕ ∧ 𝑁 ∈ ℕ) ∧ 2 ∥ 𝑁 ∧ ((2↑𝑁) − 1) = (𝑃↑𝑀)) → 𝑀 = 1)

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 400   ∨ wo 860   ∧ w3a 1101   = wceq 1568   ∈ wcel 2141   ≠ wne 2956  ∃wrex 3087   ∖ cdif 3901  {csn 4588   class class class wbr 5108  ‘cfv 6536  (class class class)co 7410  ℂcc 11097  ℝcr 11098  0cc0 11099  1c1 11100   + caddc 11102   · cmul 11104   < clt 11242   ≤ cle 11243   − cmin 11440   / cdiv 11870  ℕcn 12232  2c2 12294  3c3 12295  4c4 12296  ℕ₀cn0 12503  ℤcz 12590  ℤ_≥cuz 12861  ℝ⁺crp 13015  ⌊cfl 13822  ↑cexp 14096   ∥ cdvds 16309  ℙcprime 16728  logclog 26695

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1823  ax-4 1837  ax-5 1938  ax-6 1995  ax-7 2036  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5237  ax-sep 5256  ax-nul 5268  ax-pow 5336  ax-pr 5404  ax-un 7732  ax-inf2 9609  ax-cnex 11155  ax-resscn 11156  ax-1cn 11157  ax-icn 11158  ax-addcl 11159  ax-addrcl 11160  ax-mulcl 11161  ax-mulrcl 11162  ax-mulcom 11163  ax-addass 11164  ax-mulass 11165  ax-distr 11166  ax-i2m1 11167  ax-1ne0 11168  ax-1rid 11169  ax-rnegex 11170  ax-rrecex 11171  ax-cnre 11172  ax-pre-lttri 11173  ax-pre-lttrn 11174  ax-pre-ltadd 11175  ax-pre-mulgt0 11176  ax-pre-sup 11177  ax-addf 11178

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1102  df-3an 1103  df-tru 1571  df-fal 1581  df-ex 1808  df-nf 1812  df-sb 2095  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-nel 3063  df-ral 3078  df-rex 3088  df-rmo 3367  df-reu 3368  df-rab 3415  df-v 3455  df-sbc 3744  df-csb 3853  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-pss 3924  df-nul 4286  df-if 4487  df-pw 4563  df-sn 4589  df-pr 4591  df-tp 4593  df-op 4595  df-uni 4872  df-int 4912  df-iun 4957  df-iin 4958  df-br 5109  df-opab 5173  df-mpt 5192  df-tr 5218  df-id 5556  df-eprel 5561  df-po 5569  df-so 5570  df-fr 5614  df-se 5615  df-we 5616  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-pred 6302  df-ord 6363  df-on 6364  df-lim 6365  df-suc 6366  df-iota 6492  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-fv 6544  df-isom 6545  df-riota 7367  df-ov 7413  df-oprab 7414  df-mpo 7415  df-of 7674  df-om 7862  df-1st 7985  df-2nd 7986  df-supp 8156  df-frecs 8277  df-wrecs 8308  df-recs 8357  df-rdg 8396  df-1o 8452  df-2o 8453  df-er 8693  df-map 8825  df-pm 8826  df-ixp 8895  df-en 8943  df-dom 8944  df-sdom 8945  df-fin 8946  df-fsupp 9321  df-fi 9370  df-sup 9401  df-inf 9402  df-oi 9471  df-card 9924  df-pnf 11244  df-mnf 11245  df-xr 11246  df-ltxr 11247  df-le 11248  df-sub 11442  df-neg 11443  df-div 11871  df-nn 12233  df-2 12302  df-3 12303  df-4 12304  df-5 12305  df-6 12306  df-7 12307  df-8 12308  df-9 12309  df-n0 12504  df-z 12591  df-dec 12711  df-uz 12862  df-q 12972  df-rp 13016  df-xneg 13136  df-xadd 13137  df-xmul 13138  df-ioo 13375  df-ioc 13376  df-ico 13377  df-icc 13378  df-fz 13535  df-fzo 13682  df-fl 13824  df-mod 13902  df-seq 14037  df-exp 14097  df-fac 14309  df-bc 14338  df-hash 14366  df-shft 15103  df-cj 15149  df-re 15150  df-im 15151  df-sqrt 15285  df-abs 15286  df-limsup 15521  df-clim 15538  df-rlim 15539  df-sum 15737  df-ef 16120  df-sin 16122  df-cos 16123  df-pi 16125  df-dvds 16310  df-gcd 16552  df-prm 16729  df-pc 16896  df-struct 17206  df-sets 17223  df-slot 17241  df-ndx 17253  df-base 17269  df-ress 17290  df-plusg 17322  df-mulr 17323  df-starv 17324  df-sca 17325  df-vsca 17326  df-ip 17327  df-tset 17328  df-ple 17329  df-ds 17331  df-unif 17332  df-hom 17333  df-cco 17334  df-rest 17474  df-topn 17475  df-0g 17493  df-gsum 17494  df-topgen 17495  df-pt 17496  df-prds 17499  df-xrs 17555  df-qtop 17560  df-imas 17561  df-xps 17563  df-mre 17637  df-mrc 17638  df-acs 17640  df-mgm 18697  df-sgrp 18776  df-mnd 18792  df-submnd 18841  df-mulg 19133  df-cntz 19386  df-cmn 19851  df-psmet 21493  df-xmet 21494  df-met 21495  df-bl 21496  df-mopn 21497  df-fbas 21498  df-fg 21499  df-cnfld 21502  df-top 23030  df-topon 23047  df-topsp 23069  df-bases 23082  df-cld 23155  df-ntr 23156  df-cls 23157  df-nei 23234  df-lp 23272  df-perf 23273  df-cn 23363  df-cnp 23364  df-haus 23451  df-tx 23698  df-hmeo 23891  df-fil 23982  df-fm 24074  df-flim 24075  df-flf 24076  df-xms 24456  df-ms 24457  df-tms 24458  df-cncf 25016  df-limc 26004  df-dv 26005  df-log 26697

This theorem is referenced by:  lighneal  48308