prmdc - Intuitionistic Logic Explorer

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Theorem prmdc 12062

Description: Primality is decidable. (Contributed by Jim Kingdon, 30-Sep-2024.)

**Assertion**
Ref	Expression
prmdc	⊢ (𝑁 ∈ ℕ → DECID 𝑁 ∈ ℙ)

Proof of Theorem prmdc Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		1nuz2 9544	. . . . . . 7 ⊢ ¬ 1 ∈ (ℤ_≥‘2)
2		eleq1 2229	. . . . . . 7 ⊢ (𝑁 = 1 → (𝑁 ∈ (ℤ_≥‘2) ↔ 1 ∈ (ℤ_≥‘2)))
3	1, 2	mtbiri 665	. . . . . 6 ⊢ (𝑁 = 1 → ¬ 𝑁 ∈ (ℤ_≥‘2))
4	3	orim1i 750	. . . . 5 ⊢ ((𝑁 = 1 ∨ 𝑁 ∈ (ℤ_≥‘2)) → (¬ 𝑁 ∈ (ℤ_≥‘2) ∨ 𝑁 ∈ (ℤ_≥‘2)))
5	4	orcomd 719	. . . 4 ⊢ ((𝑁 = 1 ∨ 𝑁 ∈ (ℤ_≥‘2)) → (𝑁 ∈ (ℤ_≥‘2) ∨ ¬ 𝑁 ∈ (ℤ_≥‘2)))
6		elnn1uz2 9545	. . . 4 ⊢ (𝑁 ∈ ℕ ↔ (𝑁 = 1 ∨ 𝑁 ∈ (ℤ_≥‘2)))
7		df-dc 825	. . . 4 ⊢ (DECID 𝑁 ∈ (ℤ_≥‘2) ↔ (𝑁 ∈ (ℤ_≥‘2) ∨ ¬ 𝑁 ∈ (ℤ_≥‘2)))
8	5, 6, 7	3imtr4i 200	. . 3 ⊢ (𝑁 ∈ ℕ → DECID 𝑁 ∈ (ℤ_≥‘2))
9		2z 9219	. . . . . 6 ⊢ 2 ∈ ℤ
10	9	a1i 9	. . . . 5 ⊢ (𝑁 ∈ ℕ → 2 ∈ ℤ)
11		nnz 9210	. . . . . 6 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ)
12		peano2zm 9229	. . . . . 6 ⊢ (𝑁 ∈ ℤ → (𝑁 − 1) ∈ ℤ)
13	11, 12	syl 14	. . . . 5 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) ∈ ℤ)
14	10, 13	fzfigd 10366	. . . 4 ⊢ (𝑁 ∈ ℕ → (2...(𝑁 − 1)) ∈ Fin)
15		elfzelz 9960	. . . . . . . . 9 ⊢ (𝑥 ∈ (2...(𝑁 − 1)) → 𝑥 ∈ ℤ)
16	15	adantl 275	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 𝑥 ∈ ℤ)
17		1red 7914	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 1 ∈ ℝ)
18		2re 8927	. . . . . . . . . 10 ⊢ 2 ∈ ℝ
19	18	a1i 9	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 2 ∈ ℝ)
20	16	zred 9313	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 𝑥 ∈ ℝ)
21		1le2 9065	. . . . . . . . . 10 ⊢ 1 ≤ 2
22	21	a1i 9	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 1 ≤ 2)
23		elfzle1 9962	. . . . . . . . . 10 ⊢ (𝑥 ∈ (2...(𝑁 − 1)) → 2 ≤ 𝑥)
24	23	adantl 275	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 2 ≤ 𝑥)
25	17, 19, 20, 22, 24	letrd 8022	. . . . . . . 8 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 1 ≤ 𝑥)
26		elnnz1 9214	. . . . . . . 8 ⊢ (𝑥 ∈ ℕ ↔ (𝑥 ∈ ℤ ∧ 1 ≤ 𝑥))
27	16, 25, 26	sylanbrc 414	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 𝑥 ∈ ℕ)
28	11	adantr 274	. . . . . . 7 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → 𝑁 ∈ ℤ)
29		dvdsdc 11738	. . . . . . 7 ⊢ ((𝑥 ∈ ℕ ∧ 𝑁 ∈ ℤ) → DECID 𝑥 ∥ 𝑁)
30	27, 28, 29	syl2anc 409	. . . . . 6 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → DECID 𝑥 ∥ 𝑁)
31		dcn 832	. . . . . 6 ⊢ (DECID 𝑥 ∥ 𝑁 → DECID ¬ 𝑥 ∥ 𝑁)
32	30, 31	syl 14	. . . . 5 ⊢ ((𝑁 ∈ ℕ ∧ 𝑥 ∈ (2...(𝑁 − 1))) → DECID ¬ 𝑥 ∥ 𝑁)
33	32	ralrimiva 2539	. . . 4 ⊢ (𝑁 ∈ ℕ → ∀𝑥 ∈ (2...(𝑁 − 1))DECID ¬ 𝑥 ∥ 𝑁)
34		dcfi 6946	. . . 4 ⊢ (((2...(𝑁 − 1)) ∈ Fin ∧ ∀𝑥 ∈ (2...(𝑁 − 1))DECID ¬ 𝑥 ∥ 𝑁) → DECID ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁)
35	14, 33, 34	syl2anc 409	. . 3 ⊢ (𝑁 ∈ ℕ → DECID ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁)
36		dcan2 924	. . 3 ⊢ (DECID 𝑁 ∈ (ℤ_≥‘2) → (DECID ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁 → DECID (𝑁 ∈ (ℤ_≥‘2) ∧ ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁)))
37	8, 35, 36	sylc 62	. 2 ⊢ (𝑁 ∈ ℕ → DECID (𝑁 ∈ (ℤ_≥‘2) ∧ ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁))
38		isprm3 12050	. . 3 ⊢ (𝑁 ∈ ℙ ↔ (𝑁 ∈ (ℤ_≥‘2) ∧ ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁))
39	38	dcbii 830	. 2 ⊢ (DECID 𝑁 ∈ ℙ ↔ DECID (𝑁 ∈ (ℤ_≥‘2) ∧ ∀𝑥 ∈ (2...(𝑁 − 1)) ¬ 𝑥 ∥ 𝑁))
40	37, 39	sylibr 133	1 ⊢ (𝑁 ∈ ℕ → DECID 𝑁 ∈ ℙ)

Colors of variables: wff set class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 103 ∨ wo 698 DECID wdc 824 = wceq 1343 ∈ wcel 2136 ∀wral 2444 class class class wbr 3982 ‘cfv 5188 (class class class)co 5842 Fincfn 6706 ℝcr 7752 1c1 7754 ≤ cle 7934 − cmin 8069 ℕcn 8857 2c2 8908 ℤcz 9191 ℤ_≥cuz 9466 ...cfz 9944 ∥ cdvds 11727 ℙcprime 12039

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 ax-arch 7872 ax-caucvg 7873

This theorem depends on definitions: df-bi 116 df-stab 821 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-frec 6359 df-1o 6384 df-2o 6385 df-er 6501 df-en 6707 df-fin 6709 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-3 8917 df-4 8918 df-n0 9115 df-z 9192 df-uz 9467 df-q 9558 df-rp 9590 df-fz 9945 df-fl 10205 df-mod 10258 df-seqfrec 10381 df-exp 10455 df-cj 10784 df-re 10785 df-im 10786 df-rsqrt 10940 df-abs 10941 df-dvds 11728 df-prm 12040

This theorem is referenced by: pcmptcl 12272 pcmpt 12273 1arith 12297 prminf 12388 lgsval 13545 lgsfvalg 13546 lgsfcl2 13547 lgsval2lem 13551 lgsval4lem 13552 lgsneg 13565 lgsmod 13567 lgsdir 13576 lgsdilem2 13577 lgsdi 13578 lgsne0 13579

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