is 2 91819121 - 1
has 27640310 decimal digits
takes 332.589 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ll_dc on 2019-07-16, 0.0% done, ETC 2019-07-26
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual277333.352864.9351%695000123362506.98153.0954%340.334366.0205%1.0854%
PrimeNet2715.206761.9718%400000180000007.13725.5574%12.344064.0852%2.1134%
GPU7227583.336864.0000%600000220000009.27514.1401%92.611865.4904%1.4904%
Difference+2+250.0161+0.9351%+95000-9663750-2.2936-1.0447%+247.7225+0.5300%+0.5300%

Known prime factors:
No known factors for M91819121

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-12T04:57:27Chang Chia-Tcheexbpc1369500012336250---6.982--3.095%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-30T09:20:00Architects Cubedm1_59264265--0.041--
2013-06-25T07:40:00David CampeauManual testing265266--0.081--
2013-08-29T11:11:00Norman LeyManual testing266267--0.163--
2014-09-15T20:47:00ANONYMOUSManual testing267268--0.326--
2014-09-15T20:47:00ANONYMOUSManual testing268269--0.651--
2014-09-15T20:47:00ANONYMOUSManual testing269270--1.302--
2014-09-15T20:47:00ANONYMOUSManual testing270271--2.604--
2014-09-15T20:47:00ANONYMOUSManual testing271272--5.209--
2014-09-15T20:47:00ANONYMOUSManual testing272273--10.42--
2014-09-15T20:47:00ANONYMOUSManual testing273274--20.83--
2019-01-13T21:46:51TheJudgerManual testing274275--41.67--
2019-01-13T21:46:51TheJudgerManual testing275276--83.34--
2019-04-07T21:38:25TheJudgerManual testing276277--166.7--


ECM factoring results:
No ECM results for M91819121


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2020-04-03T21:30:21patgie3ACCC436E5A860__332.6


PRP results:
No PRP results for M91819121


P-1 factor-bounds graph:
B1 = 695000, B2 = 12336250 (P-1 stage 2)
B1 = 695000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-14T01:36:01+00:00