is 2 91556867 - 1
has 27561364 decimal digits
takes 331.639 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
Actual277334.307764.9351%710000118925006.92903.0786%341.236766.0146%1.0795%
PrimeNet2715.221761.9718%400000180000007.13725.5555%12.358964.0845%2.1127%
GPU7227583.575564.0000%600000220000009.27514.1387%92.850565.4899%1.4899%
Difference+2+250.7322+0.9351%+110000-10107500-2.3460-1.0601%+248.3862+0.5247%+0.5247%

Known prime factors:
No known factors for M91556867

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-06-01T07:29:15-Anonymous-La_novena71000011892500---6.929--3.079%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2011-01-03T20:50:00Architects Cubedm1_33264265--0.041--
2013-06-17T11:17:00David CampeauManual testing265266--0.082--
2014-06-03T01:11:00SMoffatManual testing266267--0.163--
2014-06-08T10:33:00Alex HenrieManual testing267268--0.326--
2014-06-11T07:51:00Alex HenrieManual testing268269--0.653--
2014-09-12T15:32:00shaugeManual testing269270--1.306--
2014-09-12T15:32:00shaugeManual testing270271--2.612--
2017-03-28T22:05:48monstManual testing271272--5.224--
2018-06-07T11:00:08Andrew LuebkeManual testing272273--10.45--
2018-06-20T09:00:04Tim SorberaManual testing273274--20.89--
2019-01-02T16:04:53Strolling JellyfishManual testing274275--41.79--
2019-01-04T16:05:09Strolling JellyfishManual testing275276--83.58--
2019-04-08T23:03:10TravisJankManual testing276277--167.2--


ECM factoring results:
No ECM results for M91556867


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2019-08-16T17:53:53curtiscwcm220a-24l3DE4B5A1CB3D2B__331.6


PRP results:
No PRP results for M91556867


P-1 factor-bounds graph:
B1 = 710000, B2 = 11892500 (P-1 stage 2)
B1 = 710000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2019-08-16T17:53:53+00:00