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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 1132 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → 𝐾 ∈ ℕ) | |
2 | eleq1 2902 | . . . . 5 ⊢ (𝑃 = ((2↑𝐾) + 1) → (𝑃 ∈ ℙ ↔ ((2↑𝐾) + 1) ∈ ℙ)) | |
3 | 2 | biimpa 479 | . . . 4 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ((2↑𝐾) + 1) ∈ ℙ) |
4 | 3 | 3adant1 1126 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ((2↑𝐾) + 1) ∈ ℙ) |
5 | 2pwp1prm 43758 | . . 3 ⊢ ((𝐾 ∈ ℕ ∧ ((2↑𝐾) + 1) ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝐾 = (2↑𝑛)) | |
6 | 1, 4, 5 | syl2anc 586 | . 2 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → ∃𝑛 ∈ ℕ0 𝐾 = (2↑𝑛)) |
7 | simpl 485 | . . . . . . . . 9 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → 𝑃 = ((2↑𝐾) + 1)) | |
8 | oveq2 7166 | . . . . . . . . . . 11 ⊢ (𝐾 = (2↑𝑛) → (2↑𝐾) = (2↑(2↑𝑛))) | |
9 | 8 | oveq1d 7173 | . . . . . . . . . 10 ⊢ (𝐾 = (2↑𝑛) → ((2↑𝐾) + 1) = ((2↑(2↑𝑛)) + 1)) |
10 | 9 | adantl 484 | . . . . . . . . 9 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → ((2↑𝐾) + 1) = ((2↑(2↑𝑛)) + 1)) |
11 | 7, 10 | eqtrd 2858 | . . . . . . . 8 ⊢ ((𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛)) → 𝑃 = ((2↑(2↑𝑛)) + 1)) |
12 | fmtno 43698 | . . . . . . . . 9 ⊢ (𝑛 ∈ ℕ0 → (FermatNo‘𝑛) = ((2↑(2↑𝑛)) + 1)) | |
13 | 12 | eqcomd 2829 | . . . . . . . 8 ⊢ (𝑛 ∈ ℕ0 → ((2↑(2↑𝑛)) + 1) = (FermatNo‘𝑛)) |
14 | 11, 13 | sylan9eqr 2880 | . . . . . . 7 ⊢ ((𝑛 ∈ ℕ0 ∧ (𝑃 = ((2↑𝐾) + 1) ∧ 𝐾 = (2↑𝑛))) → 𝑃 = (FermatNo‘𝑛)) |
15 | 14 | exp32 423 | . . . . . 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 1130 | . . . 4 ⊢ ((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) → (𝑛 ∈ ℕ0 → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛)))) |
18 | 17 | imp 409 | . . 3 ⊢ (((𝐾 ∈ ℕ ∧ 𝑃 = ((2↑𝐾) + 1) ∧ 𝑃 ∈ ℙ) ∧ 𝑛 ∈ ℕ0) → (𝐾 = (2↑𝑛) → 𝑃 = (FermatNo‘𝑛))) |
19 | 18 | reximdva 3276 | . 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 398 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 ∃wrex 3141 ‘cfv 6357 (class class class)co 7158 1c1 10540 + caddc 10542 ℕcn 11640 2c2 11695 ℕ0cn0 11900 ↑cexp 13432 ℙcprime 16017 FermatNocfmtno 43696 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-inf2 9106 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-se 5517 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-isom 6366 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-2o 8105 df-oadd 8108 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-sup 8908 df-inf 8909 df-oi 8976 df-card 9370 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-n0 11901 df-z 11985 df-uz 12247 df-q 12352 df-rp 12393 df-fz 12896 df-fzo 13037 df-fl 13165 df-mod 13241 df-seq 13373 df-exp 13433 df-hash 13694 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-clim 14847 df-sum 15045 df-dvds 15610 df-gcd 15846 df-prm 16018 df-pc 16176 df-fmtno 43697 |
This theorem is referenced by: (None) |
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