is 2 76372643 - 1
has 22990457 decimal digits
takes 212.544 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual275100.191764.0000 %665000133000005.46143.7191 %105.653165.3389 %
Target27450.094763.5135 %5000009000000021.69484.1923 %71.789565.0431 %
Difference+1+50.0970+0.4865 %+165000-76700000-16.2334-0.4732 %+33.8636+0.2958 %

Known prime factors (1 factor, 84.0 bits, 0.00010998% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
76372643192368910682410505676451292683.992125940980386399948
22 × 7 × 11 × 4327 × 9127 × 10353839
2016-03-1391271035383944,4592.31124.2516

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-13TheJudgerManual testing665000133000001222683.9925.5334.097%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212502.00000e-6
2000-08-10ANONYMOUSv4_computers212531.57000e-5
2003-11-08markrv4_computers212620.004
2008-05-211997rj7v4_computers212640.026
2010-09-02GrunwalderGIMPcompute-0-72642650.049
2010-09-08Charles Spaltonlinuxherd032652660.098
2010-09-10ANONYMOUSohnishi2662670.196
2010-09-13fswebfs75broad22672680.391
2010-09-17eon_blue_apocalypse4core_7years2682690.783
2010-09-24Jim Blaschakhunkajunk2692701.566
2013-01-03Jonathan A ZylstraHP2702713.131
2015-11-16RichD0Manual testing2712726.262
2016-02-20Judge HaleManual testing27227312.52
2016-02-28TheJudgerManual testing27327575.15


ECM factoring results:
No ECM results for M76372643


Lucas-Lehmer results:
No L-L results for M76372643


PRP results:
No PRP results for M76372643


CERT results:
No CERT results for M76372643


P-1 factor-bounds graph:
B1 = 665000, B2 = 13300000 (P-1 stage 2)
B1 = 665000 (P-1 stage 1)
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108
TF factor-bounds graph:
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270
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this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00