is 2 152000887 - 1
has 45756827 decimal digits
takes 886.672 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
Actual277201.368363.6364 %10940003415600024.48954.2565 %225.857865.1842 %
Target277201.368363.6364 %100000018000000090.94754.2518 %292.315865.1825 %
Difference---+94000-145844000-66.4580+0.0047%-66.4580+0.0017 %

Known prime factors (1 factor, 80.7 bits, 0.00005307% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15200088719205389224767360310999372580.6686317525378903664
24 × 3 × 29 × 71 × 19577 × 3265151
2021-02-191957732651511,611.01.66132.8103

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-02-19yphysicsManual testing10940003415600022580.66824.494.257%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-15Mr-PlonkLinux-i72642650.025
2013-01-20Chih-Wei Huangi7_fedora2652660.049
2014-09-22La GüiraManual testing2662680.295
2014-09-22La GüiraManual testing2682690.393
2014-09-22La GüiraManual testing2692700.787
2014-09-27La GüiraManual testing2702711.573
2017-10-13zhiybManual testing2712723.146
2017-12-12Choi4KANGManual testing2712723.146
2017-10-17zhiybManual testing2722736.293
2018-12-31mikrManual testing27327412.59
2018-12-31mikrManual testing27427525.17
2019-01-09nranksManual testing27527650.34
2019-01-09nranksManual testing276277100.7


ECM factoring results:
No ECM results for M152000887


Lucas-Lehmer results:
No L-L results for M152000887


PRP results:
No PRP results for M152000887


CERT results:
No CERT results for M152000887


P-1 factor-bounds graph:
B1 = 1094000, B2 = 34156000 (P-1 stage 2)
B1 = 1094000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
277
276
275
274
273
272
271
270
269
268
266
265
this exponent TF target: 77
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00