is 2 64981321 - 1
has 19561327 decimal digits
takes 157.625 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
Actual27458.876464.8649%580000102950003.90173.7511%62.778166.1828%1.3179%
PrimeNet2703.677262.8571%280000130000003.42245.2989%7.099664.8253%1.9682%
GPU7227458.876464.8649%450000140000004.17943.8616%63.055766.2217%1.3568%
Difference---+130000-3705000-0.2777-0.1106%-0.2777-0.0388%-0.0388%

Known prime factors (1 factor, 74.8 bits, 0.00011515% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64981321334390588712545498007832374.824257297469154671
3 × 11 × 59 × 36629 × 3607817		2013-06-2536629360781795.4660.81321.2913

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-06-25T04:21:00Jwb52zClay580000102950002374.8243.902315.27.8033.751%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers21259--0.001--
2004-02-14T00:00:00AxelFoxv4_computers21260--0.002--
2022-03-30T15:46:04LordJuliusManual testing260263--0.022--
2009-03-15T08:10:00dtlgcW2KAMD2800263264--0.030--
2009-03-16T05:49:00jyrivalinor264265--0.057--
2009-03-17T23:54:00glennpatLinux-3265266--0.115--
2009-11-29T03:02:00Sturle Sundegolan.ifi266267--0.230--
2009-12-07T21:58:00ANONYMOUSlarus267268--0.460--
2009-12-18T12:16:00ANONYMOUSlarus268269--0.920--
2012-01-20T17:25:00Erik Oppedijk269270--1.840--
2013-04-30T10:30:00ChuckManual testing270271--3.680--
2013-04-30T10:30:00ChuckManual testing271272--7.360--
2013-04-30T10:30:00ChuckManual testing272273--14.72--
2013-04-30T16:30:00ChuckManual testing273274--29.44--


ECM factoring results:
No ECM results for M64981321


Lucas-Lehmer results:
No L-L results for M64981321


PRP results:
No PRP results for M64981321


P-1 factor-bounds graph:
B1 = 580000, B2 = 10295000 (P-1 stage 2)
B1 = 580000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-30T15:46:04+00:00