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Mirrors > Home > MPE Home > Th. List > nprm | Structured version Visualization version GIF version |
Description: A product of two integers greater than one is composite. (Contributed by Mario Carneiro, 20-Jun-2015.) |
Ref | Expression |
---|---|
nprm | ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → ¬ (𝐴 · 𝐵) ∈ ℙ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eluzelz 11573 | . . . . 5 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ ℤ) | |
2 | 1 | adantr 480 | . . . 4 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 ∈ ℤ) |
3 | 2 | zred 11358 | . . 3 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 ∈ ℝ) |
4 | eluz2b2 11637 | . . . . . 6 ⊢ (𝐵 ∈ (ℤ≥‘2) ↔ (𝐵 ∈ ℕ ∧ 1 < 𝐵)) | |
5 | 4 | simprbi 479 | . . . . 5 ⊢ (𝐵 ∈ (ℤ≥‘2) → 1 < 𝐵) |
6 | 5 | adantl 481 | . . . 4 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 1 < 𝐵) |
7 | eluzelz 11573 | . . . . . . 7 ⊢ (𝐵 ∈ (ℤ≥‘2) → 𝐵 ∈ ℤ) | |
8 | 7 | adantl 481 | . . . . . 6 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐵 ∈ ℤ) |
9 | 8 | zred 11358 | . . . . 5 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐵 ∈ ℝ) |
10 | eluz2nn 11602 | . . . . . . 7 ⊢ (𝐴 ∈ (ℤ≥‘2) → 𝐴 ∈ ℕ) | |
11 | 10 | adantr 480 | . . . . . 6 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 ∈ ℕ) |
12 | 11 | nngt0d 10941 | . . . . 5 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 0 < 𝐴) |
13 | ltmulgt11 10762 | . . . . 5 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ ∧ 0 < 𝐴) → (1 < 𝐵 ↔ 𝐴 < (𝐴 · 𝐵))) | |
14 | 3, 9, 12, 13 | syl3anc 1318 | . . . 4 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → (1 < 𝐵 ↔ 𝐴 < (𝐴 · 𝐵))) |
15 | 6, 14 | mpbid 221 | . . 3 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 < (𝐴 · 𝐵)) |
16 | 3, 15 | ltned 10052 | . 2 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 ≠ (𝐴 · 𝐵)) |
17 | dvdsmul1 14841 | . . . . 5 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℤ) → 𝐴 ∥ (𝐴 · 𝐵)) | |
18 | 1, 7, 17 | syl2an 493 | . . . 4 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → 𝐴 ∥ (𝐴 · 𝐵)) |
19 | isprm4 15235 | . . . . . . 7 ⊢ ((𝐴 · 𝐵) ∈ ℙ ↔ ((𝐴 · 𝐵) ∈ (ℤ≥‘2) ∧ ∀𝑥 ∈ (ℤ≥‘2)(𝑥 ∥ (𝐴 · 𝐵) → 𝑥 = (𝐴 · 𝐵)))) | |
20 | 19 | simprbi 479 | . . . . . 6 ⊢ ((𝐴 · 𝐵) ∈ ℙ → ∀𝑥 ∈ (ℤ≥‘2)(𝑥 ∥ (𝐴 · 𝐵) → 𝑥 = (𝐴 · 𝐵))) |
21 | breq1 4586 | . . . . . . . 8 ⊢ (𝑥 = 𝐴 → (𝑥 ∥ (𝐴 · 𝐵) ↔ 𝐴 ∥ (𝐴 · 𝐵))) | |
22 | eqeq1 2614 | . . . . . . . 8 ⊢ (𝑥 = 𝐴 → (𝑥 = (𝐴 · 𝐵) ↔ 𝐴 = (𝐴 · 𝐵))) | |
23 | 21, 22 | imbi12d 333 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → ((𝑥 ∥ (𝐴 · 𝐵) → 𝑥 = (𝐴 · 𝐵)) ↔ (𝐴 ∥ (𝐴 · 𝐵) → 𝐴 = (𝐴 · 𝐵)))) |
24 | 23 | rspcv 3278 | . . . . . 6 ⊢ (𝐴 ∈ (ℤ≥‘2) → (∀𝑥 ∈ (ℤ≥‘2)(𝑥 ∥ (𝐴 · 𝐵) → 𝑥 = (𝐴 · 𝐵)) → (𝐴 ∥ (𝐴 · 𝐵) → 𝐴 = (𝐴 · 𝐵)))) |
25 | 20, 24 | syl5 33 | . . . . 5 ⊢ (𝐴 ∈ (ℤ≥‘2) → ((𝐴 · 𝐵) ∈ ℙ → (𝐴 ∥ (𝐴 · 𝐵) → 𝐴 = (𝐴 · 𝐵)))) |
26 | 25 | adantr 480 | . . . 4 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → ((𝐴 · 𝐵) ∈ ℙ → (𝐴 ∥ (𝐴 · 𝐵) → 𝐴 = (𝐴 · 𝐵)))) |
27 | 18, 26 | mpid 43 | . . 3 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → ((𝐴 · 𝐵) ∈ ℙ → 𝐴 = (𝐴 · 𝐵))) |
28 | 27 | necon3ad 2795 | . 2 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → (𝐴 ≠ (𝐴 · 𝐵) → ¬ (𝐴 · 𝐵) ∈ ℙ)) |
29 | 16, 28 | mpd 15 | 1 ⊢ ((𝐴 ∈ (ℤ≥‘2) ∧ 𝐵 ∈ (ℤ≥‘2)) → ¬ (𝐴 · 𝐵) ∈ ℙ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 = wceq 1475 ∈ wcel 1977 ≠ wne 2780 ∀wral 2896 class class class wbr 4583 ‘cfv 5804 (class class class)co 6549 ℝcr 9814 0cc0 9815 1c1 9816 · cmul 9820 < clt 9953 ℕcn 10897 2c2 10947 ℤcz 11254 ℤ≥cuz 11563 ∥ cdvds 14821 ℙcprime 15223 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-2o 7448 df-oadd 7451 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-seq 12664 df-exp 12723 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-dvds 14822 df-prm 15224 |
This theorem is referenced by: nprmi 15240 dvdsnprmd 15241 sqnprm 15252 mersenne 24752 ztprmneprm 41918 |
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