Primality Certificate for (4867^3187-1)/4866 | ||
| Andy Steward | 11,748 digits | 23 December 2005 |
|---|---|---|
| Originally by David Broadhurst & Bouk de Water 2005 | ||
This certificate uses a theorem of Brillhart, Lehmer and Selfridge to prove an integer N prime by making use of a partial prime factorization of N-1.
As N is a Generalized Repunit, we make use of the algebraic factorization of N-1 to arrive at the following 36.551803% factorization of N-1:
| From | Factorisation |
|---|---|
| 4867 | 31 · 157 |
| Φ2 | 2 · 2 · 1217 |
| Φ3 | 3 · 7 · 211 · 5347 |
| Φ6 | 61 · 223 · 1741 |
| Φ9 | 3 · 163 · 1999 · 27883 · 487648536841 |
| Φ18 | 19 · 109 · 88700923 · 72353549179 |
| Φ27 | 3 · p66 |
| Φ54 | 1439803 · 10161750584137855664233850077 · p33 |
| Φ59 | 26100421 · 722526391 · p198 |
| Φ118 | c214 |
| Φ177 | 5179021 · c422 |
| Φ354 | 565470397 · 3119477737 · c410 |
| Φ531 | c1284 |
| Φ1062 | 1063 · 3187 · c1277 |
| Φ1593 | 6373 · 691363 · 120239641 · p3832 |
| Φ3186 | c3850 |
From this partial factorization, we use sufficient of the largest prime factors of N-1 so that their product F is at least N 1/3 :
| 59 8064129682 2660380714 3168835175 0684328702 4936791073 1110256000 0048369946 2687231393 3905379357 2418284487 9264154970 2855158348 8747787215 4744313477 6939661687 9878239135 8166923130 8509623183 1501079542 9345991702 7706100106 6854909948 8784828974 0678937169 7633075600 1040236829 8874858029 4390563960 7182505385 7025230871 0355017927 9648520793 8249932195 0015042306 5008880116 5256971503 9509667173 4095658508 0902445878 9050607323 1317130913 5411802875 7568690123 8373187042 9291732026 6426822120 9893533044 1437353321 6642893802 6157789587 0783311492 7150326492 1461077292 8900748091 7744208866 3374697383 7526932235 8223089436 6189784330 5616332078 9105774051 8562713318 2656518197 2559613214 3082313614 4777762059 4965885057 1331560977 8958540017 8943228712 7123743763 6521743312 6164317491 7005320513 9896349210 9367114048 7483802082 7397326492 0562963135 4847498074 1698015624 9332616891 4606300624 5489813400 2470446583 7203162955 8626540629 1620724355 7001006385 0764118711 5346809461 6173824747 3828023568 6935040882 3127495323 0826476700 3690573301 9493680495 3101021766 2185260432 7900226382 0133411050 6247791381 8199239974 1265383383 2976740280 2449654340 2320820359 6715882693 4883969694 5190010036 0353625253 6277907120 2818279129 1062882328 9678664003 0306163045 5935264375 7219184671 8729761633 0064726073 9324771257 1421340583 3391028592 6520513790 5219597560 0778364852 5126674206 6914788728 2484666911 8890273901 3743486731 8030353208 9702785051 8269370556 3874334718 8960412631 9493542887 8663879140 5202406859 6298379450 1268583805 9251499510 2565598627 3235866060 0319503124 4009042842 7170086644 6689558471 4575647120 0772836304 4138862302 8266026186 7301661082 0494331189 8319961645 2028229174 9352115029 7836661665 8975675559 5850429051 5224998502 5193233587 7319455110 5583508614 2961447627 1797533550 4993350545 6625691113 5306816073 6148725878 0312905154 4784560351 6600397739 5949093920 0744010203 4866545671 9260377065 6702847816 6255653395 5934740083 7030259250 6936115893 4890599789 8583500140 8703747244 8110350732 0028246635 8946108524 8568023773 9820336817 7318381315 1358516677 9409904403 2405898510 7846545346 1373194693 3491228754 0279347636 6229429929 4943323628 8765841634 7354816909 4443412632 7407619343 1478946339 6979925176 5063169278 1978045144 6594741480 3945809794 1835050167 5882977339 0906127252 6768828723 8843813325 3810964687 6848718376 9823753460 1124222982 2304881744 6313520827 7151129001 3054367839 1733467306 5413018666 0838139777 2541879842 9947958569 3968145663 8584434351 0549571763 5742091747 5891559486 6411419472 5783138710 7941185117 2148597575 0353261786 6882859122 5263812928 8473130426 7775829806 1963134895 1832329663 1415699564 8845164938 6556980857 3231761883 2127124089 8973109529 1084818045 0970838945 5254625999 5424973435 6540151295 9096266705 0053656020 7194570906 3771885859 9714700631 2444554862 4473721670 6360189258 6534470885 9428413951 5091363171 4165924415 3130270510 5320541399 3926315047 0562271745 7657496979 3714716474 9231723938 0485249382 1182703280 9414057816 0512386506 0461412531 0456756774 6723915075 9324284628 9661957110 4097558849 3763042177 5642694101 0422213826 0597507858 0037193820 2491103222 5285062925 4493627679 0721994123 7824587588 6920144964 1278193302 8873620016 9639418594 1005868091 2906228897 5906850690 5146850588 2804484860 1060826625 7728791943 8713045706 3340698821 2556741068 7242483954 3675530898 5322968889 9997147965 6529156909 9969235510 6847179020 0250034406 2457604698 1452500546 7669429746 0731754529 2439668307 4946068395 7018252716 4482769861 5118413405 7064743105 4802113894 0247733607 2595272270 8435310085 7524739222 0617740990 8256608532 8652663774 0810266512 2069795310 9938822270 2581151578 8536553960 1673711470 8192342540 7256020069 2700581106 0789618011 2582766332 1383837371 4304140828 0441704182 4063059865 8294224141 5983035630 9837803898 4560010694 0571194434 0024722777 3866407188 0425416739 2424463782 7469539505 1443800582 3475807926 9603447184 6031820708 5926120472 7042651627 4260668645 6563221045 3634834307 5531905995 4903115382 8021046876 9030255548 8638408030 5268936087 9502187164 3624181388 2139029363 2384218279 6921262915 1863132886 4345326254 7551175071 |
| 38525305 9567783926 9281319207 6771925730 8796321311 5493311989 5950251915 2425917233 6742845893 4421207005 5978242037 8412730243 5442384039 2270214696 3858021643 7727051994 2800355730 9825290989 5791003885 4055787727 |
Note that all prime factors listed above have been proven. As primes of under 250 decimal digits can be verified in a few seconds, proof of their primality is not included here, in order to save space. Larger prime factors can take from hours to months to prove; certificates for all such factors have been PKZIPped into this file.
We set R = (N-1)/F. Note that GCD(F,R)=1 and Log(F)/Log(N) = 34.299410%
Next, we find an integer witness w such that for each prime factor p of N-1, w(N-1) ≡ 1 mod N and GCD(w(N-1)/p-1,N) = 1. In this case, w = 2 suffices.
As F2 < N < F3 and N ≡ 1 (mod F), we can let N = c2·F2 + c1·F + 1.
Brillhart, Lehmer and Selfridge's Theorem shows that N is prime if and only if c12-4·c2 is not a square.
Here, c12-4·c2 is ≡ 12 (mod 64) and therefore cannot be a square and N is prime.