is 2 58381777 - 1
has 17574667 decimal digits
takes 123.737 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
Actual27332.764464.3836 %----32.764464.3836 %
Target27332.764464.3836 %4000006500000012.04574.0807 %44.810165.8370 %
Difference----400000-65000000-12.0457-4.0807 %-12.0457-1.4534 %

Known prime factors (1 factor, 80.8 bits, 0.00013841% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5838177721159666270000343164625932580.80818121807314978048
28 × 32 × 11 × 17 × 191 × 401 × 549161
2012-10-214015491614,673.60.09310.1717

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-10-21apocalypsecapn-quad2580.8081.6900.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-23ANONYMOUSv4_computers212532.06000e-5
2000-02-09ANONYMOUSv4_computers212544.11000e-5
2000-06-28ANONYMOUSv4_computers212560.000
2001-07-17ANONYMOUSv4_computers212570.000
2002-09-22ANONYMOUSv4_computers212580.001
2003-07-30ANONYMOUSv4_computers212590.001
2003-11-28ANONYMOUSv4_computers212610.003
2008-11-03JC_Herlesv4_computers212692.016
2008-11-18JC_Herlesv4_computers212691.024
2011-06-24David CampeauManual testing2692702.048
2011-10-18tmorrowteapot2702714.096
2012-07-17XyzzyManual testing2712728.192
2012-09-29Torchwood InstituteManual testing27227316.38


ECM factoring results:
No ECM results for M58381777


Lucas-Lehmer results:
No L-L results for M58381777


PRP results:
No PRP results for M58381777


CERT results:
No CERT results for M58381777


P-1 factor-bounds graph:
101
102
103
101
102
103
104
105
106
TF factor-bounds graph:
273
272
271
270
269
261
259
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