is 2 84855917 - 1
has 25544177 decimal digits
takes 264.792 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
Actual276180.352764.4737 %6800006800003.07681.4196 %183.429564.9780 %
Target27590.175364.0000 %5500009500000025.77233.9433 %115.947665.4196 %
Difference+1+90.1774+0.4737 %+130000-94320000-22.6955-2.5238 %+67.4819-0.4416 %

Known prime factors (1 factor, 96.8 bits, 0.00011410% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
848559171403244065876411813980075689613096.825826839256169025793440
25 × 34 × 5 × 41 × 449 × 3631 × 5483 × 174077
2017-12-085483174077248,060,8580.06640.0802

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-12-08Oliver KruseHTC568000068000013096.8253.0771.594%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-08Architects Cubedm1_612642650.044
2012-08-06Carsten KossendeyManual testing2652660.088
2013-03-07Manfred Künzler SwissManual testing2662670.176
2013-03-18tmorrowteapot2672680.352
2013-03-21tmorrowteapot2682690.705
2013-03-26tmorrowteapot2692701.409
2014-08-12Ryan PropperManual testing2702712.818
2017-02-12Judge HaleManual testing27127316.91
2017-05-19ANONYMOUSManual testing27327422.54
2017-06-12The MawnManual testing27427545.09
2017-08-25HardyP GermanyManual testing27527690.18


ECM factoring results:
No ECM results for M84855917


Lucas-Lehmer results:
No L-L results for M84855917


PRP results:
No PRP results for M84855917


CERT results:
No CERT results for M84855917


P-1 factor-bounds graph:
B1 = 680000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
TF factor-bounds graph:
276
275
274
273
271
270
269
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00