is 2 61040963 - 1
has 18375161 decimal digits
takes 143.390 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
Actual27331.337164.3836%575000107812503.85264.1390%35.189665.8577%1.4742%
PrimeNet2703.914662.8571%260000120000003.06435.1326%6.978964.7635%1.9064%
GPU7227462.677064.8649%400000130000003.70073.7144%66.377866.1699%1.3051%
Difference-1-31.3400-0.4813%+175000-2218750+0.1519+0.4246%-31.1881-0.3122%-0.3122%

Known prime factors (1 factor, 76.4 bits, 0.00012510% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
61040963972619028384424241349512376.364796693712371825
52 × 149 × 281 × 557 × 1366481
2013-04-065571366481353.010.25540.4736

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-04-06T07:04:00Jwb52zClay575000107812502376.3643.853286.87.7054.139%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-06T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-10-08T00:00:00ANONYMOUSv4_computers21260--0.003--
2004-04-09T00:00:00ANONYMOUSv4_computers21262--0.010--
2022-03-29T20:51:01LordJuliusManual testing262263--0.016--
2009-02-25T19:38:00jpinedadck185d1263264--0.032--
2009-02-26T21:01:00ANONYMOUSquad264265--0.061--
2009-03-07T09:10:00nailssspentium2_8ghxb265266--0.122--
2009-03-08T09:53:00oodaira01266267--0.245--
2009-03-09T13:02:00ANONYMOUS267268--0.490--
2009-07-11T03:30:00flounderspc268269--0.979--
2011-11-01T04:54:00Roy OswaldManual testing269270--1.959--
2013-01-14T15:17:00ktonyManual testing270273--27.42--


ECM factoring results:
No ECM results for M61040963


Lucas-Lehmer results:
No L-L results for M61040963


PRP results:
No PRP results for M61040963


P-1 factor-bounds graph:
B1 = 575000, B2 = 10781250 (P-1 stage 2)
B1 = 575000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-29T20:51:01+00:00