is 2 55557787 - 1
has 16724561 decimal digits
takes 117.752 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
Actual2692.148962.3188 %----2.148962.3188 %
Target27334.429864.3836 %3600006000000011.09223.9351 %45.522165.7851 %
Difference-4-32.2809-2.0647 %-360000-60000000-11.0922-3.9351 %-43.3732-3.4663 %

Known prime factors (1 factor, 88.4 bits, 0.00015914% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
555577874130838649777348152049664412788.4173717605463458568060
22 × 3 × 5 × 31 × 53 × 521 × 571 × 5849 × 21673
2011-08-235849216731,465,3250.02060.0366

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-08-23KC8200E2788.4172.0280.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.16000e-5
2000-03-01ANONYMOUSv4_computers212544.32000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-09-30ANONYMOUSv4_computers212570.000
2002-07-27ANONYMOUSv4_computers212580.001
2008-07-14ANONYMOUSManual testing212640.034
2009-01-03Misha O2642650.067
2009-01-04Helmut Zuluswerk22652660.135
2009-01-05Helmut Zuluswerk22662670.269
2009-05-17SAHS Science DeptChem_012672680.538
2011-04-10ITSLJCA_-_ServerStation2682691.076


ECM factoring results:
No ECM results for M55557787


Lucas-Lehmer results:
No L-L results for M55557787


PRP results:
No PRP results for M55557787


CERT results:
No CERT results for M55557787


P-1 factor-bounds graph:
102
103
104
102
103
104
105
TF factor-bounds graph:
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
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00