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| 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 | 
| prmlem1.lt | ⊢ 𝑁 < ;25 | 
| Ref | Expression | 
|---|---|
| prmlem1 | ⊢ 𝑁 ∈ ℙ | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | prmlem1.n | . 2 ⊢ 𝑁 ∈ ℕ | |
| 2 | prmlem1.gt | . 2 ⊢ 1 < 𝑁 | |
| 3 | prmlem1.2 | . 2 ⊢ ¬ 2 ∥ 𝑁 | |
| 4 | prmlem1.3 | . 2 ⊢ ¬ 3 ∥ 𝑁 | |
| 5 | eluzelre 12889 | . . . . . . . 8 ⊢ (𝑥 ∈ (ℤ≥‘5) → 𝑥 ∈ ℝ) | |
| 6 | 5 | resqcld 14165 | . . . . . . 7 ⊢ (𝑥 ∈ (ℤ≥‘5) → (𝑥↑2) ∈ ℝ) | 
| 7 | eluzle 12891 | . . . . . . . 8 ⊢ (𝑥 ∈ (ℤ≥‘5) → 5 ≤ 𝑥) | |
| 8 | 5re 12353 | . . . . . . . . 9 ⊢ 5 ∈ ℝ | |
| 9 | 5nn0 12546 | . . . . . . . . . 10 ⊢ 5 ∈ ℕ0 | |
| 10 | 9 | nn0ge0i 12553 | . . . . . . . . 9 ⊢ 0 ≤ 5 | 
| 11 | le2sq2 14175 | . . . . . . . . 9 ⊢ (((5 ∈ ℝ ∧ 0 ≤ 5) ∧ (𝑥 ∈ ℝ ∧ 5 ≤ 𝑥)) → (5↑2) ≤ (𝑥↑2)) | |
| 12 | 8, 10, 11 | mpanl12 702 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℝ ∧ 5 ≤ 𝑥) → (5↑2) ≤ (𝑥↑2)) | 
| 13 | 5, 7, 12 | syl2anc 584 | . . . . . . 7 ⊢ (𝑥 ∈ (ℤ≥‘5) → (5↑2) ≤ (𝑥↑2)) | 
| 14 | 1 | nnrei 12275 | . . . . . . . 8 ⊢ 𝑁 ∈ ℝ | 
| 15 | 8 | resqcli 14225 | . . . . . . . 8 ⊢ (5↑2) ∈ ℝ | 
| 16 | prmlem1.lt | . . . . . . . . . 10 ⊢ 𝑁 < ;25 | |
| 17 | 5cn 12354 | . . . . . . . . . . . 12 ⊢ 5 ∈ ℂ | |
| 18 | 17 | sqvali 14219 | . . . . . . . . . . 11 ⊢ (5↑2) = (5 · 5) | 
| 19 | 5t5e25 12836 | . . . . . . . . . . 11 ⊢ (5 · 5) = ;25 | |
| 20 | 18, 19 | eqtri 2765 | . . . . . . . . . 10 ⊢ (5↑2) = ;25 | 
| 21 | 16, 20 | breqtrri 5170 | . . . . . . . . 9 ⊢ 𝑁 < (5↑2) | 
| 22 | ltletr 11353 | . . . . . . . . 9 ⊢ ((𝑁 ∈ ℝ ∧ (5↑2) ∈ ℝ ∧ (𝑥↑2) ∈ ℝ) → ((𝑁 < (5↑2) ∧ (5↑2) ≤ (𝑥↑2)) → 𝑁 < (𝑥↑2))) | |
| 23 | 21, 22 | mpani 696 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℝ ∧ (5↑2) ∈ ℝ ∧ (𝑥↑2) ∈ ℝ) → ((5↑2) ≤ (𝑥↑2) → 𝑁 < (𝑥↑2))) | 
| 24 | 14, 15, 23 | mp3an12 1453 | . . . . . . 7 ⊢ ((𝑥↑2) ∈ ℝ → ((5↑2) ≤ (𝑥↑2) → 𝑁 < (𝑥↑2))) | 
| 25 | 6, 13, 24 | sylc 65 | . . . . . 6 ⊢ (𝑥 ∈ (ℤ≥‘5) → 𝑁 < (𝑥↑2)) | 
| 26 | ltnle 11340 | . . . . . . 7 ⊢ ((𝑁 ∈ ℝ ∧ (𝑥↑2) ∈ ℝ) → (𝑁 < (𝑥↑2) ↔ ¬ (𝑥↑2) ≤ 𝑁)) | |
| 27 | 14, 6, 26 | sylancr 587 | . . . . . 6 ⊢ (𝑥 ∈ (ℤ≥‘5) → (𝑁 < (𝑥↑2) ↔ ¬ (𝑥↑2) ≤ 𝑁)) | 
| 28 | 25, 27 | mpbid 232 | . . . . 5 ⊢ (𝑥 ∈ (ℤ≥‘5) → ¬ (𝑥↑2) ≤ 𝑁) | 
| 29 | 28 | pm2.21d 121 | . . . 4 ⊢ (𝑥 ∈ (ℤ≥‘5) → ((𝑥↑2) ≤ 𝑁 → ¬ 𝑥 ∥ 𝑁)) | 
| 30 | 29 | adantld 490 | . . 3 ⊢ (𝑥 ∈ (ℤ≥‘5) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) | 
| 31 | 30 | adantl 481 | . 2 ⊢ ((¬ 2 ∥ 5 ∧ 𝑥 ∈ (ℤ≥‘5)) → ((𝑥 ∈ (ℙ ∖ {2}) ∧ (𝑥↑2) ≤ 𝑁) → ¬ 𝑥 ∥ 𝑁)) | 
| 32 | 1, 2, 3, 4, 31 | prmlem1a 17144 | 1 ⊢ 𝑁 ∈ ℙ | 
| Colors of variables: wff setvar class | 
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 ∈ wcel 2108 ∖ cdif 3948 {csn 4626 class class class wbr 5143 ‘cfv 6561 (class class class)co 7431 ℝcr 11154 0cc0 11155 1c1 11156 · cmul 11160 < clt 11295 ≤ cle 11296 ℕcn 12266 2c2 12321 3c3 12322 5c5 12324 ;cdc 12733 ℤ≥cuz 12878 ↑cexp 14102 ∥ cdvds 16290 ℙcprime 16708 | 
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 ax-pre-sup 11233 | 
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8014 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-2o 8507 df-er 8745 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-sup 9482 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-div 11921 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12614 df-dec 12734 df-uz 12879 df-rp 13035 df-fz 13548 df-seq 14043 df-exp 14103 df-cj 15138 df-re 15139 df-im 15140 df-sqrt 15274 df-abs 15275 df-dvds 16291 df-prm 16709 | 
| This theorem is referenced by: 5prm 17146 7prm 17148 11prm 17152 13prm 17153 17prm 17154 19prm 17155 23prm 17156 | 
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