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Theorem lgslem1 26445

Description: When 𝑎 is coprime to the prime 𝑝, 𝑎↑((𝑝 − 1) / 2) is equivalent mod 𝑝 to 1 or -1, and so adding 1 makes it equivalent to 0 or 2. (Contributed by Mario Carneiro, 4-Feb-2015.)

**Assertion**
Ref	Expression
lgslem1	⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) ∈ {0, 2})

**Proof of Theorem lgslem1**
Step	Hyp	Ref	Expression
1		eldifi 4061	. . . . . . . . 9 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ∈ ℙ)
2	1	3ad2ant2 1133	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ ℙ)
3		prmnn 16379	. . . . . . . 8 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℕ)
4	2, 3	syl 17	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ ℕ)
5		simp1 1135	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝐴 ∈ ℤ)
6		prmz 16380	. . . . . . . . . 10 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ ℤ)
7	2, 6	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ ℤ)
8	5, 7	gcdcomd 16221	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴 gcd 𝑃) = (𝑃 gcd 𝐴))
9		simp3 1137	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ¬ 𝑃 ∥ 𝐴)
10		coprm 16416	. . . . . . . . . 10 ⊢ ((𝑃 ∈ ℙ ∧ 𝐴 ∈ ℤ) → (¬ 𝑃 ∥ 𝐴 ↔ (𝑃 gcd 𝐴) = 1))
11	2, 5, 10	syl2anc 584	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (¬ 𝑃 ∥ 𝐴 ↔ (𝑃 gcd 𝐴) = 1))
12	9, 11	mpbid 231	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 gcd 𝐴) = 1)
13	8, 12	eqtrd 2778	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴 gcd 𝑃) = 1)
14		eulerth 16484	. . . . . . 7 ⊢ ((𝑃 ∈ ℕ ∧ 𝐴 ∈ ℤ ∧ (𝐴 gcd 𝑃) = 1) → ((𝐴↑(ϕ‘𝑃)) mod 𝑃) = (1 mod 𝑃))
15	4, 5, 13, 14	syl3anc 1370	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑(ϕ‘𝑃)) mod 𝑃) = (1 mod 𝑃))
16		phiprm 16478	. . . . . . . . . 10 ⊢ (𝑃 ∈ ℙ → (ϕ‘𝑃) = (𝑃 − 1))
17	2, 16	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (ϕ‘𝑃) = (𝑃 − 1))
18		nnm1nn0 12274	. . . . . . . . . 10 ⊢ (𝑃 ∈ ℕ → (𝑃 − 1) ∈ ℕ₀)
19	4, 18	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 − 1) ∈ ℕ₀)
20	17, 19	eqeltrd 2839	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (ϕ‘𝑃) ∈ ℕ₀)
21		zexpcl 13797	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ (ϕ‘𝑃) ∈ ℕ₀) → (𝐴↑(ϕ‘𝑃)) ∈ ℤ)
22	5, 20, 21	syl2anc 584	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑(ϕ‘𝑃)) ∈ ℤ)
23		1zzd 12351	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 1 ∈ ℤ)
24		moddvds 15974	. . . . . . 7 ⊢ ((𝑃 ∈ ℕ ∧ (𝐴↑(ϕ‘𝑃)) ∈ ℤ ∧ 1 ∈ ℤ) → (((𝐴↑(ϕ‘𝑃)) mod 𝑃) = (1 mod 𝑃) ↔ 𝑃 ∥ ((𝐴↑(ϕ‘𝑃)) − 1)))
25	4, 22, 23, 24	syl3anc 1370	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑(ϕ‘𝑃)) mod 𝑃) = (1 mod 𝑃) ↔ 𝑃 ∥ ((𝐴↑(ϕ‘𝑃)) − 1)))
26	15, 25	mpbid 231	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∥ ((𝐴↑(ϕ‘𝑃)) − 1))
27	19	nn0cnd 12295	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 − 1) ∈ ℂ)
28		2cnd 12051	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ∈ ℂ)
29		2ne0 12077	. . . . . . . . . . . . 13 ⊢ 2 ≠ 0
30	29	a1i 11	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ≠ 0)
31	27, 28, 30	divcan1d 11752	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝑃 − 1) / 2) · 2) = (𝑃 − 1))
32	17, 31	eqtr4d 2781	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (ϕ‘𝑃) = (((𝑃 − 1) / 2) · 2))
33	32	oveq2d 7291	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑(ϕ‘𝑃)) = (𝐴↑(((𝑃 − 1) / 2) · 2)))
34	5	zcnd 12427	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝐴 ∈ ℂ)
35		2nn0 12250	. . . . . . . . . . 11 ⊢ 2 ∈ ℕ₀
36	35	a1i 11	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ∈ ℕ₀)
37		oddprm 16511	. . . . . . . . . . . 12 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → ((𝑃 − 1) / 2) ∈ ℕ)
38	37	3ad2ant2 1133	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝑃 − 1) / 2) ∈ ℕ)
39	38	nnnn0d 12293	. . . . . . . . . 10 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝑃 − 1) / 2) ∈ ℕ₀)
40	34, 36, 39	expmuld 13867	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑(((𝑃 − 1) / 2) · 2)) = ((𝐴↑((𝑃 − 1) / 2))↑2))
41	33, 40	eqtrd 2778	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑(ϕ‘𝑃)) = ((𝐴↑((𝑃 − 1) / 2))↑2))
42	41	oveq1d 7290	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑(ϕ‘𝑃)) − 1) = (((𝐴↑((𝑃 − 1) / 2))↑2) − 1))
43		sq1 13912	. . . . . . . 8 ⊢ (1↑2) = 1
44	43	oveq2i 7286	. . . . . . 7 ⊢ (((𝐴↑((𝑃 − 1) / 2))↑2) − (1↑2)) = (((𝐴↑((𝑃 − 1) / 2))↑2) − 1)
45	42, 44	eqtr4di 2796	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑(ϕ‘𝑃)) − 1) = (((𝐴↑((𝑃 − 1) / 2))↑2) − (1↑2)))
46		zexpcl 13797	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ ((𝑃 − 1) / 2) ∈ ℕ₀) → (𝐴↑((𝑃 − 1) / 2)) ∈ ℤ)
47	5, 39, 46	syl2anc 584	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑((𝑃 − 1) / 2)) ∈ ℤ)
48	47	zcnd 12427	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝐴↑((𝑃 − 1) / 2)) ∈ ℂ)
49		ax-1cn 10929	. . . . . . 7 ⊢ 1 ∈ ℂ
50		subsq 13926	. . . . . . 7 ⊢ (((𝐴↑((𝑃 − 1) / 2)) ∈ ℂ ∧ 1 ∈ ℂ) → (((𝐴↑((𝑃 − 1) / 2))↑2) − (1↑2)) = (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)))
51	48, 49, 50	sylancl 586	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑((𝑃 − 1) / 2))↑2) − (1↑2)) = (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)))
52	45, 51	eqtrd 2778	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑(ϕ‘𝑃)) − 1) = (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)))
53	26, 52	breqtrd 5100	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)))
54	47	peano2zd 12429	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑((𝑃 − 1) / 2)) + 1) ∈ ℤ)
55		peano2zm 12363	. . . . . 6 ⊢ ((𝐴↑((𝑃 − 1) / 2)) ∈ ℤ → ((𝐴↑((𝑃 − 1) / 2)) − 1) ∈ ℤ)
56	47, 55	syl 17	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝐴↑((𝑃 − 1) / 2)) − 1) ∈ ℤ)
57		euclemma 16418	. . . . 5 ⊢ ((𝑃 ∈ ℙ ∧ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∈ ℤ ∧ ((𝐴↑((𝑃 − 1) / 2)) − 1) ∈ ℤ) → (𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)) ↔ (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∨ 𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1))))
58	2, 54, 56, 57	syl3anc 1370	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) · ((𝐴↑((𝑃 − 1) / 2)) − 1)) ↔ (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∨ 𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1))))
59	53, 58	mpbid 231	. . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∨ 𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1)))
60		dvdsval3 15967	. . . . 5 ⊢ ((𝑃 ∈ ℕ ∧ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∈ ℤ) → (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ↔ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 0))
61	4, 54, 60	syl2anc 584	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ↔ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 0))
62		2z 12352	. . . . . . 7 ⊢ 2 ∈ ℤ
63	62	a1i 11	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ∈ ℤ)
64		moddvds 15974	. . . . . 6 ⊢ ((𝑃 ∈ ℕ ∧ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∈ ℤ ∧ 2 ∈ ℤ) → ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = (2 mod 𝑃) ↔ 𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) − 2)))
65	4, 54, 63, 64	syl3anc 1370	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = (2 mod 𝑃) ↔ 𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) − 2)))
66		2re 12047	. . . . . . . 8 ⊢ 2 ∈ ℝ
67	66	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ∈ ℝ)
68	4	nnrpd 12770	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ ℝ⁺)
69		0le2 12075	. . . . . . . 8 ⊢ 0 ≤ 2
70	69	a1i 11	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 0 ≤ 2)
71	4	nnred 11988	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ ℝ)
72		prmuz2 16401	. . . . . . . . . 10 ⊢ (𝑃 ∈ ℙ → 𝑃 ∈ (ℤ_≥‘2))
73	2, 72	syl 17	. . . . . . . . 9 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ∈ (ℤ_≥‘2))
74		eluzle 12595	. . . . . . . . 9 ⊢ (𝑃 ∈ (ℤ_≥‘2) → 2 ≤ 𝑃)
75	73, 74	syl 17	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 ≤ 𝑃)
76		eldifsni 4723	. . . . . . . . 9 ⊢ (𝑃 ∈ (ℙ ∖ {2}) → 𝑃 ≠ 2)
77	76	3ad2ant2 1133	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 𝑃 ≠ 2)
78	67, 71, 75, 77	leneltd 11129	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 2 < 𝑃)
79		modid 13616	. . . . . . 7 ⊢ (((2 ∈ ℝ ∧ 𝑃 ∈ ℝ⁺) ∧ (0 ≤ 2 ∧ 2 < 𝑃)) → (2 mod 𝑃) = 2)
80	67, 68, 70, 78, 79	syl22anc 836	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (2 mod 𝑃) = 2)
81	80	eqeq2d 2749	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = (2 mod 𝑃) ↔ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 2))
82		df-2 12036	. . . . . . . 8 ⊢ 2 = (1 + 1)
83	82	oveq2i 7286	. . . . . . 7 ⊢ (((𝐴↑((𝑃 − 1) / 2)) + 1) − 2) = (((𝐴↑((𝑃 − 1) / 2)) + 1) − (1 + 1))
84	49	a1i 11	. . . . . . . 8 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → 1 ∈ ℂ)
85	48, 84, 84	pnpcan2d 11370	. . . . . . 7 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑((𝑃 − 1) / 2)) + 1) − (1 + 1)) = ((𝐴↑((𝑃 − 1) / 2)) − 1))
86	83, 85	eqtrid 2790	. . . . . 6 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑((𝑃 − 1) / 2)) + 1) − 2) = ((𝐴↑((𝑃 − 1) / 2)) − 1))
87	86	breq2d 5086	. . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 ∥ (((𝐴↑((𝑃 − 1) / 2)) + 1) − 2) ↔ 𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1)))
88	65, 81, 87	3bitr3rd 310	. . . 4 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1) ↔ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 2))
89	61, 88	orbi12d 916	. . 3 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) + 1) ∨ 𝑃 ∥ ((𝐴↑((𝑃 − 1) / 2)) − 1)) ↔ ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 0 ∨ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 2)))
90	59, 89	mpbid 231	. 2 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 0 ∨ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 2))
91		ovex 7308	. . 3 ⊢ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) ∈ V
92	91	elpr 4584	. 2 ⊢ ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) ∈ {0, 2} ↔ ((((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 0 ∨ (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) = 2))
93	90, 92	sylibr 233	1 ⊢ ((𝐴 ∈ ℤ ∧ 𝑃 ∈ (ℙ ∖ {2}) ∧ ¬ 𝑃 ∥ 𝐴) → (((𝐴↑((𝑃 − 1) / 2)) + 1) mod 𝑃) ∈ {0, 2})

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∨ wo 844 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∖ cdif 3884 {csn 4561 {cpr 4563 class class class wbr 5074 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 1c1 10872 + caddc 10874 · cmul 10876 < clt 11009 ≤ cle 11010 − cmin 11205 / cdiv 11632 ℕcn 11973 2c2 12028 ℕ₀cn0 12233 ℤcz 12319 ℤ_≥cuz 12582 ℝ⁺crp 12730 mod cmo 13589 ↑cexp 13782 ∥ cdvds 15963 gcd cgcd 16201 ℙcprime 16376 ϕcphi 16465

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949

This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-1o 8297 df-2o 8298 df-oadd 8301 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-sup 9201 df-inf 9202 df-dju 9659 df-card 9697 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-xnn0 12306 df-z 12320 df-uz 12583 df-rp 12731 df-fz 13240 df-fzo 13383 df-fl 13512 df-mod 13590 df-seq 13722 df-exp 13783 df-hash 14045 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-dvds 15964 df-gcd 16202 df-prm 16377 df-phi 16467

This theorem is referenced by: lgslem4 26448

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