is 2 58188971 - 1
has 17516626 decimal digits
takes 123.328 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC18A85E61EAA998Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275131.501065.3333%545000110362503.43153.3729%134.932566.5026%1.1693%
PrimeNet2692.051762.3188%260000110000002.59735.5431%4.649064.4075%2.0887%
GPU7227332.873064.3836%400000130000003.33904.0790%36.211965.8364%1.4528%
Difference+2+98.6280+0.9498%+145000-1963750+0.0925-0.7061%+98.7206+0.6663%+0.6663%

Known prime factors:
No known factors for M58188971

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-10-17T12:49:00PPed72Unimib54500011036250---3.432--3.373%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-08T00:00:00ANONYMOUSv4_computers21253--2.06211e-5--
1999-12-23T00:00:00ANONYMOUSv4_computers21253--2.06211e-5--
2000-02-09T00:00:00ANONYMOUSv4_computers21254--4.12423e-5--
2000-06-28T00:00:00ANONYMOUSv4_computers21256--0.000--
2000-06-29T00:00:00ANONYMOUSv4_computers21256--0.000--
2001-07-17T00:00:00ANONYMOUSv4_computers21257--0.000--
2002-06-29T00:00:00ANONYMOUSv4_computers21258--0.001--
2003-07-30T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-11-28T00:00:00ANONYMOUSv4_computers21261--0.005--
2016-02-23T17:05:34Mark RoseManual testing261263--0.022--
2008-10-28T02:21:00KYOJI_KAMEICBDC105C4263264--0.034--
2008-11-18T07:28:00KYOJI_KAMEICBDC105C4264265--0.064--
2008-11-20T23:07:00KYOJI_KAMEICBDC105C4265266--0.128--
2008-11-21T23:28:00Sturle Sundeantonov.ifi266267--0.257--
2009-06-06T00:35:00ANONYMOUS267268--0.514--
2011-06-28T11:13:00David CampeauManual testing268269--1.027--
2011-10-05T19:45:00drrsEeePC_Ffm269270--2.055--
2011-11-03T01:26:00oodaira01270271--4.110--
2012-06-02T18:50:00Craig MeyersManual testing271272--8.219--
2012-09-21T00:35:00Kevin JagetManual testing272273--16.44--
2018-12-28T23:55:56-Anonymous-Manual testing273274--32.88--
2019-01-10T14:40:07Sid & AndyManual testing274275--65.75--


ECM factoring results:
No ECM results for M58188971


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-01-29T14:58:00Stephan GruppW4nurse0133C18A85E61EAA998E123.3
2020-12-21T21:47:54FreeBSD12C18A85E61EAA998E123.3


PRP results:
No PRP results for M58188971


P-1 factor-bounds graph:
B1 = 545000, B2 = 11036250 (P-1 stage 2)
B1 = 545000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-12-21T21:47:54+00:00