is 2 91749571 - 1
has 27619373 decimal digits
takes 332.337 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual277333.605564.9351%700000127750007.13193.1211%340.737466.0295%1.0944%
PrimeNet2715.210761.9718%400000180000007.13725.5569%12.347964.0850%2.1132%
GPU7227583.399964.0000%600000220000009.27514.1397%92.675065.4903%1.4903%
Difference+2+250.2056+0.9351%+100000-9225000-2.1432-1.0186%+248.0624+0.5392%+0.5392%

Known prime factors:
No known factors for M91749571

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-07T12:56:57ATHec2-P-170000012775000---7.132--3.121%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-01-10T13:40:00Architects Cubedm1_24264265--0.041--
2013-06-20T15:28:00David CampeauManual testing265266--0.081--
2014-06-09T04:30:00ANONYMOUS266267--0.163--
2014-06-10T04:29:00Smok_bmvManual testing267268--0.326--
2014-06-13T18:06:00Vladimir Tshegolevatykhtroy268269--0.652--
2014-06-19T19:24:00Vladimir Tshegolevatykhtroy269270--1.303--
2014-09-12T15:28:00shaugeManual testing270271--2.606--
2018-03-13T03:11:28gcardonaManual testing271272--5.213--
2018-07-07T17:20:141997rj7Manual testing272273--10.43--
2018-07-28T09:00:07Tim SorberaManual testing273274--20.85--
2019-01-13T21:46:46TheJudgerManual testing274275--41.70--
2019-01-13T21:46:46TheJudgerManual testing275276--83.40--
2019-04-08T23:09:18TravisJankManual testing276277--166.8--


ECM factoring results:
No ECM results for M91749571


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2019-12-17T20:35:47Ruediger EckhardsempronF534EBCDCB6FD2__332.3


PRP results:
No PRP results for M91749571


P-1 factor-bounds graph:
B1 = 700000, B2 = 12775000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
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108
TF factor-bounds graph:
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Last modified: 2019-12-17T20:35:47+00:00