is 2 75104851 - 1
has 22608813 decimal digits
takes 207.642 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
Actual275101.883064.0000 %6550006550002.62581.5399 %104.508864.5544 %
Target27450.940363.5135 %5000009000000021.55224.1837 %72.492565.0400 %
Difference+1+50.9427+0.4865 %+155000-89345000-18.9264-2.6438 %+32.0162-0.4856 %

Known prime factors (1 factor, 81.9 bits, 0.00010906% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7510485145369216817906251977437212581.90830203919063700860
22 × 3 × 5 × 23 × 37 × 163 × 15227 × 238331
2015-09-131522723833112,1940.10980.1242

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-09-13TheJudgerManual testing65500065500012581.9082.6781.728%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-06Marzbugv4_computers212630.013
2004-08-20Marzbugv4_computers212650.050
2010-07-27GrunwalderGIMPcompute-0-02652660.099
2010-07-28Bold_Seekerpatws82662680.597
2010-08-11EthanWork22682690.796
2013-05-16Per Jessentaggart42692701.592
2013-07-10processinfoManual testing2702713.184
2013-12-22NoPaGIMPS22712726.368
2015-09-04endless_mikeManual testing27227589.15


ECM factoring results:
No ECM results for M75104851


Lucas-Lehmer results:
No L-L results for M75104851


PRP results:
No PRP results for M75104851


CERT results:
No CERT results for M75104851


P-1 factor-bounds graph:
B1 = 655000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
275
272
271
270
269
268
266
265
263
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00