is 2 78724189 - 1
has 23698343 decimal digits
takes 245.658 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
Actual27597.198964.0000 %----97.198964.0000 %
Target27597.198964.0000 %5000008500000023.09323.7752 %120.292165.3591 %
Difference----500000-85000000-23.0932-3.7752 %-23.0932-1.3591 %

Known prime factors (1 factor, 86.0 bits, 0.00010922% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
78724189763890006105536839810792012685.982485168545912576400
24 × 52 × 7 × 31 × 109 × 593 × 1051 × 82279
2016-10-22105182279193,0360.02480.0379

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-10-22Architects Cubedpfs2685.9823.0990.000%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-06-30Jossv4_computers212570.000
2008-02-031997rj7v4_computers212630.012
2008-04-031997rj7v4_computers212640.025
2011-04-25Carsten KossendeyManual testing2642670.332
2012-04-12wangyun183Manual testing2672680.380
2013-02-11Clown_RoyalManual testing2682690.759
2013-02-18Smok_bmvManual testing2692701.519
2013-06-12Norman LeyManual testing2702713.038
2015-09-01RichD0Manual testing2712726.075
2016-06-11GregManual testing27227312.15
2016-06-17AirSquirrelsManual testing27327572.90


ECM factoring results:
No ECM results for M78724189


Lucas-Lehmer results:
No L-L results for M78724189


PRP results:
No PRP results for M78724189


CERT results:
No CERT results for M78724189


P-1 factor-bounds graph:
102
103
104
102
103
104
105
TF factor-bounds graph:
275
273
272
271
270
269
268
267
264
263
257
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