is 2 77151071 - 1
has 23224787 decimal digits
takes 217.523 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
Actual27599.180864.0000%670000127300005.42533.6940%104.606165.3298%1.3298%
PrimeNet2703.097261.4286%340000160000004.87805.7511%7.975263.6468%2.2183%
GPU7227449.589363.5135%500000180000005.94204.1975%55.531365.0450%1.5315%
Difference+1+49.5916+0.4865%+170000-5270000-0.5167-0.5036%+49.0749+0.2848%+0.2848%

Known prime factors (1 factor, 76.5 bits, 0.00009913% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
771510711051122657298783155126072476.476681210671267793
3 × 17 × 227 × 6143 × 9578663
2015-08-1261439578663220.392.15733.9848

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-08-12T22:58:00Jwb52zClay670000127300002476.4765.425435.010.853.694%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-08-17T00:00:00ANONYMOUSv4_computers21253--1.55529e-5--
2003-12-02T00:00:00ANONYMOUSv4_computers21261--0.004--
2008-08-04T20:41:00ANONYMOUSManual testing21265--0.095--
2010-12-18T09:18:00Christian GeschwentnerManual testing265266--0.097--
2011-06-19T03:26:00Carsten KossendeyManual testing266267--0.194--
2012-03-25T10:18:00Special_Edoyster267268--0.387--
2013-01-14T14:42:00E.Lechner268269--0.775--
2013-03-16T06:39:00roemer2201HPCC269270--1.550--
2013-05-21T20:04:00ManpowreManual testing270271--3.099--
2015-05-21T01:45:00ChuckManual testing271272--6.199--
2015-05-21T01:45:00ChuckManual testing272273--12.40--
2015-05-21T01:45:00ChuckManual testing273274--24.80--
2015-05-21T01:45:00ChuckManual testing274275--49.59--


ECM factoring results:
No ECM results for M77151071


Lucas-Lehmer results:
No L-L results for M77151071


PRP results:
No PRP results for M77151071


P-1 factor-bounds graph:
B1 = 670000, B2 = 12730000 (P-1 stage 2)
B1 = 670000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2015-08-12T22:58:00+00:00