is 2 155654789 - 1
has 46856761 decimal digits
takes 1,021.485 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
Actual278393.283864.1026 %1800000544273380298.36676.3967 %691.650566.3988 %
Target278393.283864.1026 %90000017000000096.23183.7927 %489.515665.4641 %
Difference---+900000+374273380+202.1348+2.6039%+202.1348+0.9347 %

Known prime factors (1 factor, 95.8 bits, 0.00006156% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
155654789702722886428728898791039521592995.827225731212943512100611
29 × 829 × 36691 × 92567 × 2764543
2020-12-2092567276454351,548,6442.26612.6769

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-12-20KrieselManual testing9000003400000022995.82726.683.793%
2023-09-11Krieselemu1800000544273380
skipped known factor: 70272288642872889879103952159
--326.06.397%


Trial Factoring results:
57585960616263646566676869707172737475767778
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-23oodairacom22642650.024
2013-02-04tscc022652660.048
2015-04-12Mr-PlonkLinux-i72662670.096
2016-05-03Mr-Plonklinux_i5-46902672680.192
2016-07-19Josh FamestadManual testing2682690.384
2017-08-26La GüiraManual testing2692700.768
2017-10-14David HruskaManual testing2702711.536
2017-11-05David HruskaManual testing2712723.073
2017-12-17David HruskaManual testing2722736.145
2020-12-20KrieselManual testing27327412.29
2020-12-20KrieselManual testing27427524.58
2020-12-20KrieselManual testing27527649.16
2020-12-20KrieselManual testing27627798.32
2020-12-20KrieselManual testing277278196.6


ECM factoring results:
No ECM results for M155654789


Lucas-Lehmer results:
No L-L results for M155654789


PRP results:
dateuseridcompidcofactorsres64
2024-01-06KrieselKilroy_was_here_too
70272288642872889879103952159
E038CDF577EA45B2


CERT results:
dateuseridcompid
2024-01-07Michael Bahlen


P-1 factor-bounds graph:
B1 = 1800000, B2 = 544273380 (P-1 stage 2)
B1 = 900000, B2 = 34000000 (P-1 stage 2)
B1 = 1800000 (P-1 stage 1)
B1 = 900000 (P-1 stage 1)
103
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105
106
107
103
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105
106
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109
TF factor-bounds graph:
278
277
276
275
274
273
272
271
270
269
268
267
266
265
this exponent TF target: 78
TF double-checked to: 67
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JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00