is 2 77798873 - 1
has 23419795 decimal digits
takes 219.350 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
Actual27598.355064.0000 %675000128250005.46583.7067 %103.820865.3344 %
Target27449.176463.5135 %5500009500000023.28594.2977 %72.462365.0816 %
Difference+1+49.1786+0.4865 %+125000-82175000-17.8202-0.5910 %+31.3585+0.2528 %

Known prime factors (1 factor, 76.2 bits, 0.00009789% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
77798873843766294826275622798872376.159542274111622591
53 × 107 × 110711 × 863711
2016-09-19110711863711208.250.62030.9211

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-09-19James Heinrichi7-9206750001282500022376.1595.4664.083%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17ANONYMOUSv4_computers212531.54000e-5
2016-04-04Mark RoseManual testing253264
2010-10-15Charles A. Morrischandra2642650.048
2010-10-18AntonDeadMeat2652660.096
2010-10-22YxinityYxine2662670.192
2010-10-27ANONYMOUS2672680.384
2010-11-03arnaudSRV-2402682690.768
2010-11-26ANONYMOUS2692701.537
2013-01-10Bold_SeekerManual testing2702713.074
2016-01-08DerekManual testing2712726.147
2016-04-27Son JohanManual testing27227312.29
2016-05-11AirSquirrelsManual testing27327573.77


ECM factoring results:
No ECM results for M77798873


Lucas-Lehmer results:
No L-L results for M77798873


PRP results:
No PRP results for M77798873


CERT results:
No CERT results for M77798873


P-1 factor-bounds graph:
B1 = 675000, B2 = 12825000 (P-1 stage 2)
B1 = 675000 (P-1 stage 1)
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108
TF factor-bounds graph:
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253
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00