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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fmtno4sqrt | Structured version Visualization version GIF version | ||
| Description: The floor of the square root of the fourth Fermat number is 256. (Contributed by AV, 28-Jul-2021.) |
| Ref | Expression |
|---|---|
| fmtno4sqrt | ⊢ (⌊‘(√‘(FermatNo‘4))) = ;;256 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4nn 12325 | . . 3 ⊢ 4 ∈ ℕ | |
| 2 | fmtnosqrt 48268 | . . 3 ⊢ (4 ∈ ℕ → (⌊‘(√‘(FermatNo‘4))) = (2↑(2↑(4 − 1)))) | |
| 3 | 1, 2 | ax-mp 5 | . 2 ⊢ (⌊‘(√‘(FermatNo‘4))) = (2↑(2↑(4 − 1))) |
| 4 | 4m1e3 12370 | . . . . . 6 ⊢ (4 − 1) = 3 | |
| 5 | 4 | oveq2i 7423 | . . . . 5 ⊢ (2↑(4 − 1)) = (2↑3) |
| 6 | cu2 14238 | . . . . 5 ⊢ (2↑3) = 8 | |
| 7 | 5, 6 | eqtri 2786 | . . . 4 ⊢ (2↑(4 − 1)) = 8 |
| 8 | 7 | oveq2i 7423 | . . 3 ⊢ (2↑(2↑(4 − 1))) = (2↑8) |
| 9 | 2exp8 17149 | . . 3 ⊢ (2↑8) = ;;256 | |
| 10 | 8, 9 | eqtri 2786 | . 2 ⊢ (2↑(2↑(4 − 1))) = ;;256 |
| 11 | 3, 10 | eqtri 2786 | 1 ⊢ (⌊‘(√‘(FermatNo‘4))) = ;;256 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1570 ∈ wcel 2143 ‘cfv 6538 (class class class)co 7412 1c1 11102 − cmin 11442 ℕcn 12234 2c2 12296 3c3 12297 4c4 12298 5c5 12299 6c6 12300 8c8 12302 ;cdc 12712 ⌊cfl 13825 ↑cexp 14099 √csqrt 15286 FermatNocfmtno 48256 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-sup 9403 df-inf 9404 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-5 12307 df-6 12308 df-7 12309 df-8 12310 df-9 12311 df-n0 12506 df-z 12593 df-dec 12713 df-uz 12864 df-rp 13018 df-fl 13827 df-seq 14040 df-exp 14100 df-cj 15152 df-re 15153 df-im 15154 df-sqrt 15288 df-fmtno 48257 |
| This theorem is referenced by: fmtno4prmfac 48301 |
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