is 2 75331987 - 1
has 22677188 decimal digits
takes 208.270 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
Actual275101.575864.0000 %630000126000005.13993.6478 %106.715865.3132 %
Target27450.786763.5135 %5000009000000021.55224.1852 %72.338965.0406 %
Difference+1+50.7891+0.4865 %+130000-77400000-16.4123-0.5375 %+34.3768+0.2726 %

Known prime factors (1 factor, 86.4 bits, 0.00011463% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
75331987987436592907165020334146332686.352655389982549620668
22 × 7 × 19 × 503 × 647 × 2423 × 1562293
2016-02-1724231562293411,0210.35040.6373

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-02-17KishSamsungLap63000012600000622686.3525.1404.020%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-10-31Marzbugv4_computers212630.013
2022-06-27LordJuliusManual testing263264
2010-10-03Xyzzy32642650.050
2010-12-05eon_blue_apocalypse6pack-22652660.099
2010-12-08eon_blue_apocalypse6pack-22662670.198
2010-12-12oilwarzonedotcomb2bwebserver2672680.397
2010-12-18arnaudSRV-3302682690.794
2012-12-10Per Jessenlouiswu62692701.587
2014-08-05SMoffatManual testing2702713.174
2015-09-03Judge HaleManual testing2712726.349
2016-01-26Matthias WurtingerManual testing27227312.70
2016-01-31TheJudgerManual testing27327576.18


ECM factoring results:
No ECM results for M75331987


Lucas-Lehmer results:
No L-L results for M75331987


PRP results:
No PRP results for M75331987


CERT results:
No CERT results for M75331987


P-1 factor-bounds graph:
B1 = 630000, B2 = 12600000 (P-1 stage 2)
B1 = 630000 (P-1 stage 1)
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108
TF factor-bounds graph:
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271
270
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268
267
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263
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00