is 2 91914793 - 1
has 27669110 decimal digits
takes 332.936 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
Actual277333.005964.9351 %705000132187507.28373.1474 %340.289666.0387 %
Target27583.250064.0000 %60000011000000034.45684.1407 %117.706865.4906 %
Difference+2+249.7558+0.9351 %+105000-96781250-27.1731-0.9933 %+222.5828+0.5481 %

Known prime factors (1 factor, 86.8 bits, 0.00009439% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
919147931310576042366344321714157292786.760712929877547754648
23 × 3 × 34457 × 175649 × 4908089
2019-06-271756494908089307,3432.27682.6232

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-06-27Brian Beuninghp8300f70500013218750622786.7607.2843.826%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-08Architects Cubedm1_752642650.041
2013-06-27David CampeauManual testing2652660.081
2014-02-04SMoffatManual testing2662670.163
2014-02-06ANONYMOUSManual testing2672680.325
2014-09-23ANONYMOUSManual testing2682701.951
2015-01-09David HruskaManual testing2702712.602
2018-03-26gcardonaManual testing2712725.203
2018-09-11penluManual testing27227310.41
2018-09-18gcardonaManual testing27327420.81
2019-01-19Strolling JellyfishManual testing274276124.9
2019-04-16TravisJankManual testing276277166.5


ECM factoring results:
No ECM results for M91914793


Lucas-Lehmer results:
No L-L results for M91914793


PRP results:
No PRP results for M91914793


CERT results:
No CERT results for M91914793


P-1 factor-bounds graph:
B1 = 705000, B2 = 13218750 (P-1 stage 2)
B1 = 705000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
277
276
274
273
272
271
270
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