is 2 107072621 - 1
has 32232071 decimal digits
takes 439.146 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPD79988EE8D6B3982verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276142.931064.4737%9130005418300022.68964.7529%165.620666.1622%1.6885%
PrimeNet2728.931662.5000%450000220000009.65865.4085%18.590264.5282%2.0282%
GPU72276142.931064.4737%7000002400000011.71233.9751%154.643365.8859%1.4122%
Difference---+213000+30183000+10.9773+0.7779%+10.9773+0.2763%+0.2763%

Known prime factors:
No known factors for M107072621

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-10-30T01:59:17Simon Josefssoncto1291300054183000---22.69--4.753%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-04-30T01:16:00RichardFX5000_1263264--0.018--
2010-09-10T07:45:00kiwiboyp4_1693264265--0.035--
2012-05-17T15:33:00Thomas StorkRainbow265266--0.070--
2013-10-02T06:29:00ANONYMOUS266267--0.140--
2013-10-02T10:33:00ANONYMOUS267268--0.279--
2015-01-20T14:33:00Brandon VincentManual testing268269--0.558--
2015-01-25T16:00:00ITSLJCA_-_ServerStation269270--1.117--
2015-01-27T21:20:00zulianX1_Gen2270271--2.233--
2018-02-13T17:57:45el groccoManual testing271272--4.467--
2020-03-20T19:45:10srow7Manual testing272273--8.933--
2020-03-20T19:45:10srow7Manual testing273274--17.87--
2021-04-08T18:21:21TheJudgerManual testing274275--35.73--
2021-04-08T18:21:21TheJudgerManual testing275276--71.47--


ECM factoring results:
No ECM results for M107072621


Lucas-Lehmer results:
No L-L results for M107072621


PRP results:
dateuseridcompidcofactorsres64PRP
2021-10-31T15:23:15Ben Deloi-07cfe2ab4327aa496D79988EE8D6B3982no


P-1 factor-bounds graph:
B1 = 913000, B2 = 54183000 (P-1 stage 2)
B1 = 913000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-10-31T15:23:15+00:00