is 2 91749521 - 1
has 27619358 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
Actual277333.605764.9351%700000122500006.98173.0934%340.587466.0198%1.0847%
PrimeNet2715.210761.9718%400000180000007.13725.5569%12.347964.0850%2.1132%
GPU7227583.400064.0000%600000220000009.27514.1397%92.675065.4903%1.4903%
Difference+2+250.2057+0.9351%+100000-9750000-2.2934-1.0464%+247.9123+0.5295%+0.5295%

Known prime factors (1 factor, 79.0 bits, 0.00008614% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
917495216192290422375866761964012479.0353374562806914200
23 × 3 × 52 × 11 × 68993 × 7410859
2019-07-096899374108591,906.32.46333.9608

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-09T16:10:26Jwb52zClay700000122500002479.0356.982664.713.963.093%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-30T10:30:00Architects Cubedm1_03264265--0.041--
2013-06-20T15:28:00David CampeauManual testing265266--0.081--
2013-08-29T12:19:00Norman LeyManual testing266267--0.163--
2014-09-20T15:02:00workerthreadManual testing267268--0.326--
2014-09-24T07:45:00workerthreadManual testing268269--0.652--
2014-09-30T07:55:00workerthreadManual testing269270--1.303--
2014-11-21T14:26:00Houd Al-Obaidlihpi7270271--2.606--
2018-03-12T18:10:52gcardonaManual testing271272--5.213--
2018-07-07T17:20:141997rj7Manual testing272273--10.43--
2018-07-28T09:00:07Tim SorberaManual testing273274--20.85--
2019-01-13T21:46:54TheJudgerManual testing274275--41.70--
2019-01-13T21:46:54TheJudgerManual testing275276--83.40--
2019-04-08T23:09:18TravisJankManual testing276277--166.8--


ECM factoring results:
No ECM results for M91749521


Lucas-Lehmer results:
No L-L results for M91749521


PRP results:
No PRP results for M91749521


P-1 factor-bounds graph:
B1 = 700000, B2 = 12250000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-07-09T16:10:26+00:00