is 2 55073261 - 1
has 16578704 decimal digits
takes 116.725 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
Actual2718.680863.3803 %----8.680863.3803 %
Target27334.732764.3836 %3600006000000011.09223.9307 %45.825065.7835 %
Difference-2-26.0520-1.0033 %-360000-60000000-11.0922-3.9307 %-37.1442-2.4033 %

Known prime factors (1 factor, 74.4 bits, 0.00013511% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
55073261251350995613843757113612374.412228196942626880
26 × 5 × 103357 × 6899537
2012-05-071033576899537129.621.45562.1577

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-05-07NoPaGIMPS22374.4123.8220.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-01ANONYMOUSv4_computers212532.18000e-5
2000-03-01ANONYMOUSv4_computers212544.36000e-5
2000-05-24ANONYMOUSv4_computers212560.000
2001-09-10ANONYMOUSv4_computers212570.000
2002-06-29ANONYMOUSv4_computers212580.001
2008-07-28ANONYMOUSManual testing212640.034
2009-03-03glennpatglenndual2642650.068
2009-03-04glennpatglenndual2652660.136
2009-03-06glennpatglenndual2662670.271
2009-05-11KonradWORK22672680.543
2011-04-06eon_blue_apocalypseStraight-82682691.086
2011-06-04tmorrowpaperclip2692702.171
2011-08-28TheJudgerManual testing2702714.342


ECM factoring results:
No ECM results for M55073261


Lucas-Lehmer results:
No L-L results for M55073261


PRP results:
No PRP results for M55073261


CERT results:
No CERT results for M55073261


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
271
270
269
268
267
266
265
264
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00