is 2 1636157 - 1
has 492533 decimal digits
takes 0.073 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8252E676FD03AA28double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26718.160868.6567 %500000150000000.08355.0006 %18.244370.2241 %
Target2610.187765.5738 %65003500000.00161.1192 %0.189465.9591 %
Difference+6+17.9731+3.0829 %+493500+14650000+0.0819+3.8814%+18.0550+4.2650 %

Known prime factors (1 factor, 61.5 bits, 0.00376159% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
163615733653943573857696411961.5451028444812260
22 × 3 × 5 × 241 × 71123431
2008-05-03241711234310.18770.25100.4687

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012---8.758%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-07ANONYMOUSv4_computers212570.012
2003-06-09ANONYMOUSv4_computers212580.023
2003-06-17ANONYMOUSv4_computers212580.023


ECM factoring results:
Total ECM effort:31.417 GHz-days
Estimated T-Level:25.716
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.66718.874%
302500000.14386.662%
3510000000.01099.007%


ECM Summary

B1B2factorcurvesGHz-days
10.085
50000500000024913.99
250000400000005017.34


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-28ANONYMOUSv4_computers8252E676FD03AA280.073


PRP results:
dateuseridcompidcofactorsres64
2017-10-02Oliver KruseGTX-3
3365394357385769641
1B5F297C1085A4FF
2017-11-02kkmrkkblmbrbkc4.xlarge
3365394357385769641
1B5F297C1085A4FF


CERT results:
No CERT results for M1636157


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00