is 2 72685439 - 1
has 21880498 decimal digits
takes 194.333 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
Actual275105.274364.0000%620000114700004.69533.5548%109.969665.2797%1.2797%
PrimeNet2703.287561.4286%320000140000004.13005.5364%7.417463.5640%2.1355%
GPU7227452.635963.5135%500000170000005.42344.1223%58.059465.0176%1.5041%
Difference+1+52.6384+0.4865%+120000-5530000-0.7282-0.5676%+51.9102+0.2621%+0.2621%

Known prime factors (1 factor, 81.4 bits, 0.00011193% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7268543930918683821602714842821432581.35521268829250383089
41543 × 64033 × 7995431
2015-08-266403379954317,509.21.92353.1541

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-08-26T22:33:00Jwb52zClay620000114700002581.3554.695388.79.3913.555%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-06-02T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-09-19T11:27:00Wojciech FlorekManual testing21264--0.049--
2010-06-07T20:46:00Kevin JagetLaptop264265--0.051--
2010-09-01T00:51:00Kevin JagetLaptop265266--0.103--
2010-09-06T06:25:00KYOJI_KAMEI266267--0.206--
2010-09-09T06:08:00eon_blue_apocalypseWooba-Gooba267268--0.411--
2010-09-13T14:13:00arnaudSPR14268269--0.822--
2012-11-28T01:41:00NoWhereManAMD-1090T269270--1.645--
2013-04-20T11:40:00SMoffatManual testing270271--3.290--
2015-03-11T14:28:00srow7Manual testing271272--6.580--
2015-08-17T09:57:00FredrikManual testing272273--13.16--
2015-08-24T10:32:00S36049Manual testing273274--26.32--
2015-08-24T10:32:00S36049Manual testing274275--52.64--


ECM factoring results:
No ECM results for M72685439


Lucas-Lehmer results:
No L-L results for M72685439


PRP results:
No PRP results for M72685439


P-1 factor-bounds graph:
B1 = 620000, B2 = 11470000 (P-1 stage 2)
B1 = 620000 (P-1 stage 1)
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TF factor-bounds graph:
275
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2100
Last modified: 2015-08-26T22:33:00+00:00