is 2 72661607 - 1
has 21873324 decimal digits
takes 194.269 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
Actual275105.308864.0000%620000114700004.69533.5546%110.004165.2797%1.2797%
PrimeNet2703.288561.4286%320000140000004.13005.5361%7.418563.5639%2.1354%
GPU7227452.653263.5135%500000170000005.42344.1222%58.076665.0176%1.5040%
Difference+1+52.6556+0.4865%+120000-5530000-0.7282-0.5676%+51.9275+0.2621%+0.2621%

Known prime factors (1 factor, 79.3 bits, 0.00010907% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
726616077211944722542535799100172479.2554962692830714944
26 × 3 × 13 × 608989 × 3264851
2015-08-1860898932648512,000.12.92184.8048

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-08-18T17:11:00Jwb52zClay620000114700002479.2554.695388.59.3913.555%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-05-25T00:00:00Jocelyn Larouchev4_computers21257--0.000--
2008-09-19T11:27:00Wojciech FlorekManual testing21264--0.049--
2010-05-22T13:17:00GrunwalderGIMPcompute-0-5264265--0.051--
2010-05-23T14:02:00GrunwalderGIMPcompute-0-5265266--0.103--
2010-05-23T23:28:00Kevin BrushMac_Pro266267--0.206--
2010-05-24T05:19:00Kevin BrushMac_Pro267268--0.411--
2010-05-27T12:37:00seekuaX3-710268269--0.823--
2012-11-21T08:41:00Robert_SoCalManual testing269270--1.645--
2013-04-19T13:38:00Houd Al-Obaidlidell_i7270271--3.291--
2015-03-12T01:20:001997rj7Manual testing271272--6.582--
2015-08-16T19:30:00Guido LorenziniManual testing272273--13.16--
2015-08-16T19:30:00Guido LorenziniManual testing273274--26.33--
2015-08-16T19:30:00Guido LorenziniManual testing274275--52.66--


ECM factoring results:
No ECM results for M72661607


Lucas-Lehmer results:
No L-L results for M72661607


PRP results:
No PRP results for M72661607


P-1 factor-bounds graph:
B1 = 620000, B2 = 11470000 (P-1 stage 2)
B1 = 620000 (P-1 stage 1)
104
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104
105
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108
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
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264
257
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2100
Last modified: 2015-08-18T17:11:00+00:00