is 2 80581951 - 1
has 24257585 decimal digits
takes 251.455 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L3E61C103326FF2__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27594.958164.0000%680000136000006.26183.7709%101.219965.3575%1.3575%
PrimeNet2715.932861.9718%340000160000005.39895.2514%11.331763.9689%1.9970%
GPU7227594.958164.0000%500000170000006.32993.7862%101.288065.3630%1.3630%
Difference---+180000-3400000-0.0681-0.0153%-0.0681-0.0055%-0.0055%

Known prime factors:
No known factors for M80581951

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2017-02-06T10:03:43CuboxRaven680000136000006---6.262--3.771%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-12-10T12:30:00Architects Cubedm1_50264265--0.046--
2011-01-24T07:38:00firejugglerManual testing265267--0.278--
2011-01-24T07:38:00firejugglerManual testing267268--0.371--
2011-01-24T07:38:00firejugglerManual testing268269--0.742--
2011-01-25T07:27:00ANONYMOUSManual testing269270--1.484--
2013-06-07T18:08:00NoPaGIMPS2270271--2.968--
2016-05-18T16:55:07Judge HaleManual testing271272--5.935--
2016-05-18T16:55:07Judge HaleManual testing272273--11.87--
2016-10-21T09:55:08Judge HaleManual testing273274--23.74--
2016-10-23T22:02:01Mark RoseManual testing274275--47.48--


ECM factoring results:
No ECM results for M80581951


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2018-07-24T19:35:17aurashiftusslcburnin353E61C103326FF2__251.5


PRP results:
No PRP results for M80581951


P-1 factor-bounds graph:
B1 = 680000, B2 = 13600000 (P-1 stage 2)
B1 = 680000 (P-1 stage 1)
104
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104
105
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108
TF factor-bounds graph:
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2100
Last modified: 2018-07-24T19:35:17+00:00