is 2 62989999 - 1
has 18961880 decimal digits
takes 147.968 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L789BA2F71E9CA299double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275121.478165.3333%595000124950004.23503.5356%125.713266.5590%1.2257%
PrimeNet2703.793562.8571%260000120000003.06435.1527%6.857764.7710%1.9139%
GPU7227460.737764.8649%400000130000003.70073.7293%64.438466.1752%1.3103%
Difference+1+60.7405+0.4685%+195000-505000+0.5343-0.1936%+61.2748+0.3839%+0.3839%

Known prime factors:
No known factors for M62989999

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-07-23T15:23:00Koekiens259500012495000---4.235--3.536%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-21T00:00:00ANONYMOUSv4_computers21259--0.001--
2016-02-23T17:18:37Mark RoseManual testing259263--0.024--
2009-02-05T19:42:00Wojciech Florekarmada4263264--0.031--
2009-02-23T19:41:00arnaudSRV-170264265--0.059--
2009-02-25T19:44:00arnaudSRV-330265266--0.119--
2009-02-28T12:55:00arnaudSRV-330266267--0.237--
2009-03-07T16:09:00abcC30D35CA5267268--0.475--
2009-08-15T17:58:00ANONYMOUS268269--0.949--
2012-04-18T00:45:00kevshawKERMIT269270--1.898--
2013-02-25T17:19:00Architects CubedManual testing270271--3.796--
2013-02-25T18:19:00Architects CubedManual testing271272--7.593--
2013-04-06T05:27:00ktonyManual testing272273--15.19--
2013-08-31T22:42:00Jerry HallettManual testing273274--30.37--
2020-10-28T14:34:05laxeyeManual testing274275--60.74--


ECM factoring results:
No ECM results for M62989999


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-12-17T04:41:00ANONYMOUS789BA2F71E9CA299148.0
2021-09-20T04:05:30woaiwinnie2SUPERSHIP789BA2F71E9CA299148.0


PRP results:
No PRP results for M62989999


P-1 factor-bounds graph:
B1 = 595000, B2 = 12495000 (P-1 stage 2)
B1 = 595000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-09-20T04:05:30+00:00