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Mirrors > Home > MPE Home > Th. List > prmlem1a | Structured version Visualization version GIF version |
Description: A quick proof skeleton to show that the numbers less than 25 are prime, by trial division. (Contributed by Mario Carneiro, 18-Feb-2014.) |
Ref | Expression |
---|---|
prmlem1.n | ⊢ 𝑁 ∈ ℕ |
prmlem1.gt | ⊢ 1 < 𝑁 |
prmlem1.2 | ⊢ ¬ 2 ∥ 𝑁 |
prmlem1.3 | ⊢ ¬ 3 ∥ 𝑁 |
prmlem1a.x | ⊢ ((¬ 2 ∥ 5 ∧ 𝑥 ∈ (ℤ≥‘5)) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) |
Ref | Expression |
---|---|
prmlem1a | ⊢ 𝑁 ∈ ℙ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | prmlem1.n | . . 3 ⊢ 𝑁 ∈ ℕ | |
2 | prmlem1.gt | . . 3 ⊢ 1 < 𝑁 | |
3 | eluz2b2 12590 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘2) ↔ (𝑁 ∈ ℕ ∧ 1 < 𝑁)) | |
4 | 1, 2, 3 | mpbir2an 707 | . 2 ⊢ 𝑁 ∈ (ℤ≥‘2) |
5 | breq1 5073 | . . . . . 6 ⊢ (𝑥 = 2 → (𝑥 ∥ 𝑁 ↔ 2 ∥ 𝑁)) | |
6 | 5 | notbid 317 | . . . . 5 ⊢ (𝑥 = 2 → (¬ 𝑥 ∥ 𝑁 ↔ ¬ 2 ∥ 𝑁)) |
7 | 6 | imbi2d 340 | . . . 4 ⊢ (𝑥 = 2 → (((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁) ↔ ((𝑥↑2) ≤ 𝑁 → ¬ 2 ∥ 𝑁))) |
8 | prmnn 16307 | . . . . . 6 ⊢ (𝑥 ∈ ℙ → 𝑥 ∈ ℕ) | |
9 | 8 | adantr 480 | . . . . 5 ⊢ ((𝑥 ∈ ℙ ∧ 𝑥 ≠ 2) → 𝑥 ∈ ℕ) |
10 | eldifsn 4717 | . . . . . 6 ⊢ (𝑥 ∈ (ℙ ∖ {2}) ↔ (𝑥 ∈ ℙ ∧ 𝑥 ≠ 2)) | |
11 | n2dvds1 16005 | . . . . . . . . 9 ⊢ ¬ 2 ∥ 1 | |
12 | prmlem1a.x | . . . . . . . . . . 11 ⊢ ((¬ 2 ∥ 5 ∧ 𝑥 ∈ (ℤ≥‘5)) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) | |
13 | prmlem1.3 | . . . . . . . . . . . 12 ⊢ ¬ 3 ∥ 𝑁 | |
14 | 13 | a1i 11 | . . . . . . . . . . 11 ⊢ (3 ∈ ℙ → ¬ 3 ∥ 𝑁) |
15 | 3p2e5 12054 | . . . . . . . . . . 11 ⊢ (3 + 2) = 5 | |
16 | 12, 14, 15 | prmlem0 16735 | . . . . . . . . . 10 ⊢ ((¬ 2 ∥ 3 ∧ 𝑥 ∈ (ℤ≥‘3)) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) |
17 | 1nprm 16312 | . . . . . . . . . . 11 ⊢ ¬ 1 ∈ ℙ | |
18 | 17 | pm2.21i 119 | . . . . . . . . . 10 ⊢ (1 ∈ ℙ → ¬ 1 ∥ 𝑁) |
19 | 1p2e3 12046 | . . . . . . . . . 10 ⊢ (1 + 2) = 3 | |
20 | 16, 18, 19 | prmlem0 16735 | . . . . . . . . 9 ⊢ ((¬ 2 ∥ 1 ∧ 𝑥 ∈ (ℤ≥‘1)) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) |
21 | 11, 20 | mpan 686 | . . . . . . . 8 ⊢ (𝑥 ∈ (ℤ≥‘1) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) |
22 | nnuz 12550 | . . . . . . . 8 ⊢ ℕ = (ℤ≥‘1) | |
23 | 21, 22 | eleq2s 2857 | . . . . . . 7 ⊢ (𝑥 ∈ ℕ → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) |
24 | 23 | expd 415 | . . . . . 6 ⊢ (𝑥 ∈ ℕ → (𝑥 ∈ (ℙ ∖ {2}) → ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁))) |
25 | 10, 24 | syl5bir 242 | . . . . 5 ⊢ (𝑥 ∈ ℕ → ((𝑥 ∈ ℙ ∧ 𝑥 ≠ 2) → ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁))) |
26 | 9, 25 | mpcom 38 | . . . 4 ⊢ ((𝑥 ∈ ℙ ∧ 𝑥 ≠ 2) → ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁)) |
27 | prmlem1.2 | . . . . 5 ⊢ ¬ 2 ∥ 𝑁 | |
28 | 27 | 2a1i 12 | . . . 4 ⊢ (𝑥 ∈ ℙ → ((𝑥↑2) ≤ 𝑁 → ¬ 2 ∥ 𝑁)) |
29 | 7, 26, 28 | pm2.61ne 3029 | . . 3 ⊢ (𝑥 ∈ ℙ → ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁)) |
30 | 29 | rgen 3073 | . 2 ⊢ ∀𝑥 ∈ ℙ ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁) |
31 | isprm5 16340 | . 2 ⊢ (𝑁 ∈ ℙ ↔ (𝑁 ∈ (ℤ≥‘2) ∧ ∀𝑥 ∈ ℙ ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁))) | |
32 | 4, 30, 31 | mpbir2an 707 | 1 ⊢ 𝑁 ∈ ℙ |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ≠ wne 2942 ∀wral 3063 ∖ cdif 3880 {csn 4558 class class class wbr 5070 ‘cfv 6418 (class class class)co 7255 1c1 10803 < clt 10940 ≤ cle 10941 ℕcn 11903 2c2 11958 3c3 11959 5c5 11961 ℤ≥cuz 12511 ↑cexp 13710 ∥ cdvds 15891 ℙcprime 16304 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-n0 12164 df-z 12250 df-uz 12512 df-rp 12660 df-fz 13169 df-seq 13650 df-exp 13711 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-dvds 15892 df-prm 16305 |
This theorem is referenced by: prmlem1 16737 prmlem2 16749 |
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