is 2 263284391 - 1
has 79256500 decimal digits
takes 2,998.517 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
Actual2711.815860.5634 %1000001000001.65141.2636 %3.467261.0617 %
Target280930.045965.0000 %1600000325000000317.39244.0555 %1,247.438366.4194 %
Difference-9-928.2300-4.4366 %-1500000-324900000-315.7410-2.7919 %-1,243.9710-5.3577 %

Known prime factors (1 factor, 82.4 bits, 0.00003128% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
26328439161851533448413524144969132582.35511746145150020216
23 × 13 × 35257 × 44623 × 71789
2019-05-0344623717893,720.20.76131.4997

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-05-03MadPooManual testing10000010000012582.3551.6510.351%


Trial Factoring results:
575859606162636465666768697071727374757677787980
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-10-23GrunwalderGIMPManual testing2612690.453
2016-07-24YxinityManual testing2692700.454
2018-09-11La GüiraManual testing2702710.908


ECM factoring results:
No ECM results for M263284391


Lucas-Lehmer results:
No L-L results for M263284391


PRP results:
No PRP results for M263284391


CERT results:
No CERT results for M263284391


P-1 factor-bounds graph:
B1 = 100000 (P-1 stage 1)
103
104
105
103
104
105
TF factor-bounds graph:
271
270
269
this exponent TF target: 80
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00