is 2 78806771 - 1
has 23723202 decimal digits
takes 245.915 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
Actual27597.097164.0000 %710000173950007.32573.9703 %104.422865.4293 %
Target27597.097164.0000 %5000008500000023.09323.7757 %120.190365.3593 %
Difference---+210000-67605000-15.7675+0.1946%-15.7675+0.0701 %

Known prime factors (1 factor, 90.2 bits, 0.00011441% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7880677113833762246410334032293905612890.1608777013745690921680
24 × 33 × 5 × 17 × 53 × 365507 × 12338789
2016-08-19365507123387893,305,7164.60545.6811

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-08-19Craig MeyersManual testing71000017395000622890.1607.1313.970%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-06-23Jossv4_computers212570.000
2016-04-04Mark RoseManual testing257264
2010-11-10Net_ForceKathy_PC2642650.047
2010-11-15ANONYMOUS2652660.095
2010-11-20JKL2662670.190
2010-11-24Craig MeyersManual testing2672680.379
2011-01-30ITSSP-Koko2682690.759
2011-02-05ANONYMOUS2692701.517
2013-02-11Clown_RoyalManual testing2702713.034
2016-02-04Stef42Manual testing2712726.069
2016-06-20Matthias WurtingerManual testing27227312.14
2016-06-27HardyP GermanyManual testing27327572.82


ECM factoring results:
No ECM results for M78806771


Lucas-Lehmer results:
No L-L results for M78806771


PRP results:
No PRP results for M78806771


CERT results:
No CERT results for M78806771


P-1 factor-bounds graph:
B1 = 710000, B2 = 17395000 (P-1 stage 2)
B1 = 710000 (P-1 stage 1)
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105
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108
TF factor-bounds graph:
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273
272
271
270
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267
266
265
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257
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00