is 2 90775123 - 1
has 27326035 decimal digits
takes 328.808 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
Actual277337.186764.9351 %745000175075008.70963.3543 %345.896366.1112 %
Target27584.295264.0000 %60000010000000031.59524.0613 %115.890465.4621 %
Difference+2+252.8915+0.9351 %+145000-82492500-22.8856-0.7071 %+230.0059+0.6492 %

Known prime factors (1 factor, 85.8 bits, 0.00009454% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
90775123683708646001963793228852472685.822376594722984822501
3 × 83 × 1672 × 2459 × 22053799
2019-04-05278892205379997,9236.449311.787

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-03-20penluManual testing745000175075006--8.8254.067%
2019-04-05Jouni Makkonenpuistola695000132050001222685.8226.7293.813%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-06Carsten Kossendeymother2652660.082
2010-12-02Carsten KossendeyManual testing2662670.165
2011-02-13Carsten KossendeyManual testing2672680.329
2013-06-26Carsten KossendeyManual testing2682690.659
2014-03-31Preben SManual testing2692701.317
2014-11-19shaugeManual testing2702712.634
2016-06-05Carsten KossendeyManual testing2712725.269
2017-06-21Carsten KossendeyManual testing27227310.54
2018-12-09TheJudgerManual testing273276147.5
2019-01-20TheJudgerManual testing276277168.6


ECM factoring results:
No ECM results for M90775123


Lucas-Lehmer results:
No L-L results for M90775123


PRP results:
No PRP results for M90775123


CERT results:
No CERT results for M90775123


P-1 factor-bounds graph:
B1 = 745000, B2 = 17507500 (P-1 stage 2)
B1 = 695000, B2 = 13205000 (P-1 stage 2)
B1 = 745000 (P-1 stage 1)
B1 = 695000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
277
276
273
272
271
270
269
268
267
266
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00