is 2 85856027 - 1
has 25845240 decimal digits
takes 276.528 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
Actual276178.251864.4737 %6900006900003.22241.4314 %181.474364.9822 %
Target27589.124964.0000 %5500009500000026.60103.9490 %115.725965.4216 %
Difference+1+89.1269+0.4737 %+140000-94310000-23.3786-2.5176 %+65.7484-0.4394 %

Known prime factors (1 factor, 87.5 bits, 0.00010188% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
858560272141759903338309185828050092787.4691247297352426003352
23 × 17 × 19 × 479 × 1399 × 14323 × 50291
2018-02-111432350291487,7000.07600.1361

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-02-11TheJudgerManual testing69000069000012787.4693.6241.607%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-14Architects Cubedm1_432642650.044
2013-02-25AxelssonManual testing2652660.087
2013-10-26bayanneMacPro2662670.174
2013-10-28bayanneManual testing26727210.79
2017-03-16Strolling JellyfishManual testing27227311.14
2017-05-19ANONYMOUSManual testing27327422.28
2017-10-22electron1897Manual testing274276133.7


ECM factoring results:
No ECM results for M85856027


Lucas-Lehmer results:
No L-L results for M85856027


PRP results:
No PRP results for M85856027


CERT results:
No CERT results for M85856027


P-1 factor-bounds graph:
B1 = 690000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
276
274
273
272
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00