is 2 81844957 - 1
has 24637788 decimal digits
takes 255.396 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
Actual27593.492764.0000 %690000136275006.31143.7863 %99.804165.3631 %
Target27593.492764.0000 %5500009000000024.53973.8856 %118.032465.3988 %
Difference---+140000-76372500-18.2283-0.0993 %-18.2283-0.0358 %

Known prime factors (1 factor, 82.0 bits, 0.00010021% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8184495748929781894328819502735692582.01729891751237848912
24 × 23 × 131 × 233879 × 2651191
2017-07-30233879265119117,0241.65412.1537

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-07-30TheJudgerManual testing69000013627500622582.0177.3263.786%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-15Architects Cubedm1_052642650.046
2011-02-28firejugglerManual testing2652660.091
2011-02-28ANONYMOUSManual testing2662670.183
2011-03-02Davide Alberellilaptop-ubuntu2672680.365
2011-03-03shaugeManual testing2682715.113
2016-08-17BdotManual testing27127317.53
2016-12-131997rj7Manual testing27327570.12


ECM factoring results:
No ECM results for M81844957


Lucas-Lehmer results:
No L-L results for M81844957


PRP results:
No PRP results for M81844957


CERT results:
No CERT results for M81844957


P-1 factor-bounds graph:
B1 = 690000, B2 = 13627500 (P-1 stage 2)
B1 = 690000 (P-1 stage 1)
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105
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104
105
106
107
108
TF factor-bounds graph:
275
273
271
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00