is 2 27152453 - 1
has 8173703 decimal digits
takes 25.135 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L449DFC6C18DACCCFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2708.800364.2857%1350000891000008.22927.8143%17.029567.0765%2.7908%
PrimeNet2660.543962.1212%12000045000000.48145.2127%1.025364.0957%1.9745%
GPU722708.800364.2857%20000060000000.69263.9040%9.492965.6800%1.3943%
Difference---+1150000+83100000+7.5366+3.9102%+7.5366+1.3965%+1.3965%

Known prime factors (1 factor, 77.5 bits, 0.00028544% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
271524532142116255813119136430472477.5033944609085251191
7 × 83 × 173 × 577 × 68015191
2021-01-08577680151911,252.04.97479.2899

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2005-12-19T00:00:00ANONYMOUSv4_computers415000415000---0.557--1.944%
2021-01-08T03:02:58firejugglerMaison1350000891000002477.5038.22950.2716.467.814%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-15T06:26:19firejugglerMaison5000002300000065--2.633


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-18T00:00:00Net_Forcev4_computers21256--0.000--
2002-08-31T00:00:00Jocelyn Larouchev4_computers21257--0.001--
2004-03-16T00:00:00ANONYMOUSv4_computers21262--0.023--
2004-10-18T00:00:00msslabv4_computers21267--1.094--
2013-06-07T21:18:00David CampeauManual testing267268--1.101--
2018-04-09T13:24:10VictordeHollanderManual testing268269--2.202--
2018-09-11T02:25:26chuenkitManual testing269270--4.403--


ECM factoring results:
No ECM results for M27152453


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2007-07-04T00:00:00markrv4_computers449DFC6C18DACCCF25.13
2011-09-20T04:54:00ANONYMOUS449DFC6C18DACCCF25.13


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-10T18:21:56mrhx
214211625581311913643047
A48D492536B20D__no
2021-01-23T18:54:54JaytholomewJaytholomew
214211625581311913643047
A48D492536B20D44no


P-1 factor-bounds graph:
B1 = 1350000, B2 = 89100000 (P-1 stage 2)
B1 = 1350000 (P-1 stage 1)
B1 = 415000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-15T06:26:19+00:00