is 2 67072151 - 1
has 20190730 decimal digits
takes 169.543 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
Actual2717.127863.3803%725000161312505.73395.6044%12.861765.4326%2.0523%
PrimeNet2703.562662.8571%280000130000003.56645.3196%7.129064.8330%1.9758%
GPU7227457.041064.8649%450000150000004.55493.9289%61.596066.2453%1.3804%
Difference-3-49.9132-1.4846%+275000+1131250+1.1789+1.6755%-48.7343-0.8127%-0.8127%

Known prime factors (1 factor, 71.7 bits, 0.00010696% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6707215139405555987457887473272271.73929375497430713
7 × 452671 × 9270529
2013-08-2545267192705298.62953.42003.4577

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-08-25T16:08:00Jwb52zClay725000161312502271.7395.734339.111.475.604%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-12-11T07:40:00Wojciech FlorekManual testing263264--0.029--
2009-03-31T20:42:00NoWhereManIngrid264265--0.056--
2009-04-02T10:12:00NoWhereManIngrid265266--0.111--
2009-04-03T23:37:00jfarekCarnegie10266267--0.223--
2009-04-11T04:59:00JShaftarithmometer267268--0.446--
2010-06-12T22:07:00chargerFH526.3000.01268269--0.891--
2012-02-14T08:55:00sikafarmi_rendering_farmManual testing269270--1.783--
2013-06-25T08:20:00Le ComteManual testing270271--3.565--


ECM factoring results:
No ECM results for M67072151


Lucas-Lehmer results:
No L-L results for M67072151


PRP results:
No PRP results for M67072151


P-1 factor-bounds graph:
B1 = 725000, B2 = 16131250 (P-1 stage 2)
B1 = 725000 (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: 2013-08-25T16:08:33+00:00