is 2 75687851 - 1
has 22784314 decimal digits
takes 209.254 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
Actual275101.098264.0000 %655000131000005.34393.6967 %106.442165.3308 %
Target27450.548063.5135 %5000009000000021.55224.1877 %72.100265.0414 %
Difference+1+50.5503+0.4865 %+155000-76900000-16.2083-0.4910 %+34.3420+0.2894 %

Known prime factors (1 factor, 86.0 bits, 0.00011362% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
75687851770561592867458408407425132685.994509039154029791656
23 × 32 × 23 × 59 × 602033 × 8654033
2016-04-206020338654033152,7364.17214.9118

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-04-20David HruskaDesktopIIc655000131000001222685.9945.4504.073%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2004-08-20Marzbugv4_computers212630.013
2009-05-04bayannebilbo2632650.075
2010-08-09TeraTismS2652660.099
2010-08-14Geir S. Eidissenpc22662670.197
2010-08-20Helmut Zulusko-server2672680.395
2010-08-31tmorrowPrimadonna2682690.790
2010-09-03Per Jessenlouiswu72692701.580
2013-07-10Fabrice Belletlinux102702713.159
2013-12-30SMoffatManual testing2712726.319
2016-02-17Judge HaleManual testing27227312.64
2016-04-051997rj7Manual testing27327425.28
2016-04-07endless_mikeManual testing27427550.55


ECM factoring results:
No ECM results for M75687851


Lucas-Lehmer results:
No L-L results for M75687851


PRP results:
No PRP results for M75687851


CERT results:
No CERT results for M75687851


P-1 factor-bounds graph:
B1 = 655000, B2 = 13100000 (P-1 stage 2)
B1 = 655000 (P-1 stage 1)
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108
TF factor-bounds graph:
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263
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00