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| Mirrors > Home > ILE Home > Th. List > dec5nprm | GIF version | ||
| Description: A decimal number greater than 10 and ending with five is not a prime number. (Contributed by Mario Carneiro, 19-Apr-2015.) |
| Ref | Expression |
|---|---|
| dec5nprm.1 | ⊢ 𝐴 ∈ ℕ |
| Ref | Expression |
|---|---|
| dec5nprm | ⊢ ¬ ;𝐴5 ∈ ℙ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2nn 9468 | . . . 4 ⊢ 2 ∈ ℕ | |
| 2 | dec5nprm.1 | . . . 4 ⊢ 𝐴 ∈ ℕ | |
| 3 | 1, 2 | nnmulcli 9327 | . . 3 ⊢ (2 · 𝐴) ∈ ℕ |
| 4 | peano2nn 9317 | . . 3 ⊢ ((2 · 𝐴) ∈ ℕ → ((2 · 𝐴) + 1) ∈ ℕ) | |
| 5 | 3, 4 | ax-mp 5 | . 2 ⊢ ((2 · 𝐴) + 1) ∈ ℕ |
| 6 | 5nn 9471 | . 2 ⊢ 5 ∈ ℕ | |
| 7 | 1nn0 9581 | . . 3 ⊢ 1 ∈ ℕ0 | |
| 8 | 1lt2 9476 | . . 3 ⊢ 1 < 2 | |
| 9 | 1, 2, 7, 7, 8 | numlti 9815 | . 2 ⊢ 1 < ((2 · 𝐴) + 1) |
| 10 | 1lt5 9485 | . 2 ⊢ 1 < 5 | |
| 11 | 1 | nncni 9315 | . . . . . 6 ⊢ 2 ∈ ℂ |
| 12 | 2 | nncni 9315 | . . . . . 6 ⊢ 𝐴 ∈ ℂ |
| 13 | 5cn 9385 | . . . . . 6 ⊢ 5 ∈ ℂ | |
| 14 | 11, 12, 13 | mul32i 8473 | . . . . 5 ⊢ ((2 · 𝐴) · 5) = ((2 · 5) · 𝐴) |
| 15 | 5t2e10 9878 | . . . . . . 7 ⊢ (5 · 2) = ;10 | |
| 16 | 13, 11, 15 | mulcomli 8333 | . . . . . 6 ⊢ (2 · 5) = ;10 |
| 17 | 16 | oveq1i 6095 | . . . . 5 ⊢ ((2 · 5) · 𝐴) = (;10 · 𝐴) |
| 18 | 14, 17 | eqtri 2259 | . . . 4 ⊢ ((2 · 𝐴) · 5) = (;10 · 𝐴) |
| 19 | 13 | mullidi 8329 | . . . 4 ⊢ (1 · 5) = 5 |
| 20 | 18, 19 | oveq12i 6097 | . . 3 ⊢ (((2 · 𝐴) · 5) + (1 · 5)) = ((;10 · 𝐴) + 5) |
| 21 | 3 | nncni 9315 | . . . 4 ⊢ (2 · 𝐴) ∈ ℂ |
| 22 | ax-1cn 8272 | . . . 4 ⊢ 1 ∈ ℂ | |
| 23 | 21, 22, 13 | adddiri 8337 | . . 3 ⊢ (((2 · 𝐴) + 1) · 5) = (((2 · 𝐴) · 5) + (1 · 5)) |
| 24 | dfdec10 9782 | . . 3 ⊢ ;𝐴5 = ((;10 · 𝐴) + 5) | |
| 25 | 20, 23, 24 | 3eqtr4i 2269 | . 2 ⊢ (((2 · 𝐴) + 1) · 5) = ;𝐴5 |
| 26 | 5, 6, 9, 10, 25 | nprmi 12904 | 1 ⊢ ¬ ;𝐴5 ∈ ℙ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ¬ wn 3 ∈ wcel 2209 (class class class)co 6085 0cc0 8179 1c1 8180 + caddc 8182 · cmul 8184 ℕcn 9305 2c2 9356 5c5 9359 ;cdc 9779 ℙcprime 12887 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4246 ax-sep 4249 ax-nul 4259 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-iinf 4735 ax-cnex 8270 ax-resscn 8271 ax-1cn 8272 ax-1re 8273 ax-icn 8274 ax-addcl 8275 ax-addrcl 8276 ax-mulcl 8277 ax-mulrcl 8278 ax-addcom 8279 ax-mulcom 8280 ax-addass 8281 ax-mulass 8282 ax-distr 8283 ax-i2m1 8284 ax-0lt1 8285 ax-1rid 8286 ax-0id 8287 ax-rnegex 8288 ax-precex 8289 ax-cnre 8290 ax-pre-ltirr 8291 ax-pre-ltwlin 8292 ax-pre-lttrn 8293 ax-pre-apti 8294 ax-pre-ltadd 8295 ax-pre-mulgt0 8296 ax-pre-mulext 8297 ax-arch 8298 ax-caucvg 8299 |
| This proof depends on definitions: df-bi 117 df-dc 847 df-3or 1010 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-if 3639 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-tr 4230 df-id 4438 df-po 4441 df-iso 4442 df-iord 4511 df-on 4513 df-ilim 4514 df-suc 4516 df-iom 4738 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-1st 6374 df-2nd 6375 df-recs 6576 df-frec 6662 df-1o 6687 df-2o 6688 df-er 6807 df-en 7023 df-pnf 8362 df-mnf 8363 df-xr 8364 df-ltxr 8365 df-le 8366 df-sub 8499 df-neg 8500 df-reap 8904 df-ap 8911 df-div 9004 df-inn 9306 df-2 9364 df-3 9365 df-4 9366 df-5 9367 df-6 9368 df-7 9369 df-8 9370 df-9 9371 df-n0 9566 df-z 9647 df-dec 9780 df-uz 9924 df-q 10022 df-rp 10057 df-seqfrec 10887 df-exp 10978 df-cj 11609 df-re 11610 df-im 11611 df-rsqrt 11766 df-abs 11767 df-dvds 12557 df-prm 12888 |
| This theorem is used by: (None) |
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