is 2 53962861 - 1
has 16244440 decimal digits
takes 106.614 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
Actual2681.104661.7647 %----1.104661.7647 %
Target27335.447464.3836 %3600006000000010.33993.9206 %45.787365.7799 %
Difference-5-34.3429-2.6189 %-360000-60000000-10.3399-3.9206 %-44.6828-4.0152 %

Known prime factors (1 factor, 80.8 bits, 0.00014973% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5396286121016623284572103156174392580.79819473229268340779
23 × 31 × 593 × 1193 × 3769 × 10243
2011-04-243769102434,772.40.01180.0220

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-04-24Colt45wsadelaide2580.7981.8620.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.22000e-5
2000-03-01ANONYMOUSv4_computers212544.45000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-08-24ANONYMOUSv4_computers212570.000
2002-08-10ANONYMOUSv4_computers212580.001
2004-06-211997rj7v4_computers212600.001
2007-10-291997rj7v4_computers212630.018
2008-09-29ANONYMOUSManual testing212640.035
2008-12-22Sturle Sundeklengel.ifi2642650.069
2008-12-23Sturle Sundeklengel.ifi2652660.138
2008-12-24Sturle Sundegimo.ifi2662670.277
2009-07-04Lukin DmitryDmitry2672680.554


ECM factoring results:
No ECM results for M53962861


Lucas-Lehmer results:
No L-L results for M53962861


PRP results:
No PRP results for M53962861


CERT results:
No CERT results for M53962861


P-1 factor-bounds graph:
102
103
104
102
103
104
105
TF factor-bounds graph:
268
267
266
265
264
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00