is 2 61478359 - 1
has 18506831 decimal digits
takes 144.417 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
Actual27331.114164.3836 %----31.114164.3836 %
Target27462.231164.8649 %4000006500000013.35073.7178 %75.581866.1711 %
Difference-1-31.1170-0.4813 %-400000-65000000-13.3507-3.7178 %-44.4677-1.7876 %

Known prime factors (1 factor, 79.5 bits, 0.00012927% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
614783598390882852194040748763192479.4736824257339232201
11 × 16451 × 46399 × 812759
2013-05-08463998127593,561.00.30030.3216

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-05-08James Heinrich3930K2479.4734.1370.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-23Gordon Spencev4_computers212590.001
2003-10-31Gordon Spencev4_computers212600.001
2004-04-09ANONYMOUSv4_computers212620.005
2022-03-29LordJuliusManual testing262263
2009-04-04bayannebilbo2632640.032
2009-04-05tmorrowteapot2642650.061
2009-04-06tmorrowteapot2652660.122
2009-04-07tmorrowteapot2662680.729
2009-07-15RogerRoger2682690.972
2011-11-21driveByUpgradesrh2692701.945
2012-08-27SWL551Manual testing2702713.890
2013-02-13Tom DuellManual testing27127323.34


ECM factoring results:
No ECM results for M61478359


Lucas-Lehmer results:
No L-L results for M61478359


PRP results:
No PRP results for M61478359


CERT results:
No CERT results for M61478359


P-1 factor-bounds graph:
103
104
105
103
104
105
106
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
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Last modified: 2024-03-13T02:15:48+00:00