is 2 148000961 - 1
has 44552729 decimal digits
takes 848.693 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
Actual27425.850362.1622 %2205000220500018.33423.0054 %44.184563.2994 %
Target277206.810663.6364 %90000017000000084.08834.1405 %290.898965.1420 %
Difference-3-180.9603-1.4742 %+1305000-167795000-65.7541-1.1351 %-246.7144-1.8427 %

Known prime factors (1 factor, 81.1 bits, 0.00005481% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14800096126358418802735572323235612581.1258904813396020980
22 × 5 × 9767 × 22159 × 2057233
2020-08-262215920572333,309.01.10621.7406

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-08-26timbitManual testing2205000220500012581.12518.332.216%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-04nomadAt_Home32642650.025
2013-01-03tscpdm2652660.050
2015-03-09GrunwalderGIMPMotherInLaw2662670.101
2015-03-10Andrew BManual testing2672680.202
2015-04-12La GüiraManual testing2682690.404
2015-04-12La GüiraManual testing2692700.808
2015-04-19La GüiraManual testing2702711.616
2016-06-10La GüiraManual testing2712723.231
2016-06-12d3zorggen3-perf-12722736.463
2018-12-27mikrManual testing27327412.93


ECM factoring results:
No ECM results for M148000961


Lucas-Lehmer results:
No L-L results for M148000961


PRP results:
No PRP results for M148000961


CERT results:
No CERT results for M148000961


P-1 factor-bounds graph:
B1 = 2205000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
this exponent TF target: 77
TF double-checked to: 67
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00