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Mirrors > Home > MPE Home > Th. List > Mathboxes > 2pwp1prmfmtno | Structured version Visualization version GIF version |
Description: Every prime number of the form ((2↑𝑘) + 1) must be a Fermat number. (Contributed by AV, 7-Aug-2021.) |
Ref | Expression |
---|---|
2pwp1prmfmtno | ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝑃 = (FermatNo‘𝑛)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1128 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → 𝐾 ∈ ℕ) | |
2 | eleq1 2897 | . . . . 5 ⊢ (𝑃 = ((2↑𝐾) + 1) → (𝑃 ∈ ℙ ↔ ((2↑𝐾) + 1) ∈ ℙ)) | |
3 | 2 | biimpa 477 | . . . 4 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ((2↑𝐾) + 1) ∈ ℙ) |
4 | 3 | 3adant1 1122 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ((2↑𝐾) + 1) ∈ ℙ) |
5 | 2pwp1prm 43628 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ ((2↑𝐾) + 1) ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝐾 = (2↑𝑛)) | |
6 | 1, 4, 5 | syl2anc 584 | . 2 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝐾 = (2↑𝑛)) |
7 | simpl 483 | . . . . . . . . 9 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → 𝑃 = ((2↑𝐾) + 1)) | |
8 | oveq2 7153 | . . . . . . . . . . 11 ⊢ (𝐾 = (2↑𝑛) → (2↑𝐾) = (2↑(2↑𝑛))) | |
9 | 8 | oveq1d 7160 | . . . . . . . . . 10 ⊢ (𝐾 = (2↑𝑛) → ((2↑𝐾) + 1) = ((2↑(2↑𝑛)) + 1)) |
10 | 9 | adantl 482 | . . . . . . . . 9 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → ((2↑𝐾) + 1) = ((2↑(2↑𝑛)) + 1)) |
11 | 7, 10 | eqtrd 2853 | . . . . . . . 8 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → 𝑃 = ((2↑(2↑𝑛)) + 1)) |
12 | fmtno 43568 | . . . . . . . . 9 ⊢ (𝑛 ∈ ℕ0 → (FermatNo‘𝑛) = ((2↑(2↑𝑛)) + 1)) | |
13 | 12 | eqcomd 2824 | . . . . . . . 8 ⊢ (𝑛 ∈ ℕ0 → ((2↑(2↑𝑛)) + 1) = (FermatNo‘𝑛)) |
14 | 11, 13 | sylan9eqr 2875 | . . . . . . 7 ⊢ ((𝑛 ∈ ℕ0 ∧ (𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛))) → 𝑃 = (FermatNo‘𝑛)) |
15 | 14 | exp32 421 | . . . . . 6 ⊢ (𝑛 ∈ ℕ0 → (𝑃 = ((2↑𝐾) + 1) → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛)))) |
16 | 15 | com12 32 | . . . . 5 ⊢ (𝑃 = ((2↑𝐾) + 1) → (𝑛 ∈ ℕ0 → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛)))) |
17 | 16 | 3ad2ant2 1126 | . . . 4 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → (𝑛 ∈ ℕ0 → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛)))) |
18 | 17 | imp 407 | . . 3 ⊢ (((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) ∧ 𝑛 ∈ ℕ0) → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛))) |
19 | 18 | reximdva 3271 | . 2 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → (∃𝑛 ∈ ℕ0 𝐾 = (2↑𝑛) → ∃𝑛 ∈ ℕ0 𝑃 = (FermatNo‘𝑛))) |
20 | 6, 19 | mpd 15 | 1 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝑃 = (FermatNo‘𝑛)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1079 = wceq 1528 ∈ wcel 2105 ∃wrex 3136 ‘cfv 6348 (class class class)co 7145 1c1 10526 + caddc 10528 ℕcn 11626 2c2 11680 ℕ0cn0 11885 ↑cexp 13417 ℙcprime 16003 FermatNocfmtno 43566 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-inf2 9092 ax-cnex 10581 ax-resscn 10582 ax-1cn 10583 ax-icn 10584 ax-addcl 10585 ax-addrcl 10586 ax-mulcl 10587 ax-mulrcl 10588 ax-mulcom 10589 ax-addass 10590 ax-mulass 10591 ax-distr 10592 ax-i2m1 10593 ax-1ne0 10594 ax-1rid 10595 ax-rnegex 10596 ax-rrecex 10597 ax-cnre 10598 ax-pre-lttri 10599 ax-pre-lttrn 10600 ax-pre-ltadd 10601 ax-pre-mulgt0 10602 ax-pre-sup 10603 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-fal 1541 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-nel 3121 df-ral 3140 df-rex 3141 df-reu 3142 df-rmo 3143 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-int 4868 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-lim 6189 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-om 7570 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-rdg 8035 df-1o 8091 df-2o 8092 df-oadd 8095 df-er 8278 df-en 8498 df-dom 8499 df-sdom 8500 df-fin 8501 df-sup 8894 df-inf 8895 df-oi 8962 df-card 9356 df-pnf 10665 df-mnf 10666 df-xr 10667 df-ltxr 10668 df-le 10669 df-sub 10860 df-neg 10861 df-div 11286 df-nn 11627 df-2 11688 df-3 11689 df-n0 11886 df-z 11970 df-uz 12232 df-q 12337 df-rp 12378 df-fz 12881 df-fzo 13022 df-fl 13150 df-mod 13226 df-seq 13358 df-exp 13418 df-hash 13679 df-cj 14446 df-re 14447 df-im 14448 df-sqrt 14582 df-abs 14583 df-clim 14833 df-sum 15031 df-dvds 15596 df-gcd 15832 df-prm 16004 df-pc 16162 df-fmtno 43567 |
This theorem is referenced by: (None) |
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