is 2 61555097 - 1
has 18529931 decimal digits
takes 144.597 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
Actual27331.075364.3836 %----31.075364.3836 %
Target27462.153564.8649 %4000006500000013.35073.7184 %75.504266.1713 %
Difference-1-31.0782-0.4813 %-400000-65000000-13.3507-3.7184 %-44.4289-1.7878 %

Known prime factors (1 factor, 103.0 bits, 0.00016739% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
615550971041229221952042903747596968953732103.03884577010897411379576544
25 × 7 × 17 × 37 × 131 × 13441 × 153949 × 2214491
2013-03-2215394922144912.452e+90.90681.0672

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-03-22HBendtzHAL900732103.0384.1100.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-09Gordon Spencev4_computers212590.001
2003-11-08Gordon Spencev4_computers212600.001
2004-04-09ANONYMOUSv4_computers212620.005
2022-03-29LordJuliusManual testing262263
2009-02-03oodaira052632640.032
2009-02-07Cyber-ertDennis-PC2642650.061
2009-02-13peckardCF341B4412652660.121
2009-04-05S485122D610-H2662680.728
2009-09-17SAHS Physics ClubPhysicsclub32682690.971
2012-03-26CLICHEJean-Baptiste2692701.942
2012-09-12TrexWork2702713.885
2013-03-15Kyle AskineManual testing27127323.31


ECM factoring results:
No ECM results for M61555097


Lucas-Lehmer results:
No L-L results for M61555097


PRP results:
No PRP results for M61555097


CERT results:
No CERT results for M61555097


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
273
271
270
269
268
266
265
264
263
262
260
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
2100
2110
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Last modified: 2024-03-13T02:15:48+00:00