is 2 402637127 - 1
has 121205853 decimal digits
takes 7,668.746 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
Actual2849,730.517565.4762 %250000007500000001,781.30495.8967 %11,511.822467.5120 %
Target2811,216.314364.1975 %2400000500000000814.99864.3972 %2,031.312965.7718 %
Difference+3+8,514.2032+1.2787 %+22600000+250000000+966.3062+1.4995%+9,480.5094+1.7401 %

Known prime factors (1 factor, 114.6 bits, 0.00002845% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4026371273071576056256214216399059493408075135114.56538143229353216279734668625
32 × 53 × 72 × 17 × 89 × 8191 × 416989 × 133896247
2020-12-04416989133896247318,849,612212.36376.29

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-12-04Roland ClarksonManual testing25000000750000000235114.5651,7937.338%


Trial Factoring results:
57585960616263646566676869707172737475767778798081828384
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-01-08The MawnManual testing2652680.130
2017-08-18sasakiManual testing2682690.148
2018-11-24sasakiManual testing2692700.297
2020-05-25SRBaseManual testing2702710.594
2020-08-05SRBaseManual testing2712721.188
2020-11-28Roland ClarksonManual testing2722732.376
2020-11-28Roland ClarksonManual testing2732744.751
2020-11-28Roland ClarksonManual testing2742759.50
2020-11-28Roland ClarksonManual testing27527619.00
2020-11-28Roland ClarksonManual testing27627738.01
2020-11-28Roland ClarksonManual testing27727876.02
2020-11-28Roland ClarksonManual testing278279152.0
2020-11-28Roland ClarksonManual testing279280304.1
2020-11-28Roland ClarksonManual testing280281608.2
2020-11-28Roland ClarksonManual testing2812821,216
2020-11-28Roland ClarksonManual testing2822832,433
2020-11-28Roland ClarksonManual testing2832844,865


ECM factoring results:
No ECM results for M402637127


Lucas-Lehmer results:
No L-L results for M402637127


PRP results:
No PRP results for M402637127


CERT results:
No CERT results for M402637127


P-1 factor-bounds graph:
B1 = 25000000, B2 = 750000000 (P-1 stage 2)
B1 = 25000000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 81
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00