is 2 1569551 - 1
has 472482 decimal digits
takes 0.070 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L22C7FF6FA8CCE938double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26718.931568.6567 %500000150000000.08354.9756 %19.015070.2162 %
Target2610.195765.5738 %65003000000.00151.0518 %0.197265.9359 %
Difference+6+18.7358+3.0829 %+493500+14700000+0.0821+3.9237%+18.8179+4.2803 %

Known prime factors (1 factor, 66.6 bits, 0.00424169% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15695511099588755116167217832166.57635028767944341
32 × 83 × 373 × 125717411
2013-10-133731257174119.40930.44360.8285

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000300000--0.0022.397%
2011-01-30James HeinrichWHS8000013800006--0.0104.499%
2016-03-17alpertronManual testing5000001500000012---8.719%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-10-25ANONYMOUSv4_computers212570.012
2003-08-08ANONYMOUSv4_computers212580.024
2010-05-03Architects Cubeda3_bu22602610.098
2010-05-24GrunwalderGIMPManual testing212631.017


ECM factoring results:
Total ECM effort:31.171 GHz-days
Estimated T-Level:25.716
DigitsB1CompleteFacMiss
201100014.5770.000%
25500001.66718.874%
302500000.14386.662%
3510000000.01099.007%


ECM Summary

B1B2factorcurvesGHz-days
10.112
50000500000024913.81
250000400000005017.25


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-14ANONYMOUSv4_computers22C7FF6FA8CCE9380.070


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-0
109958875511616721783
965C62FA71E7718D
2017-10-31kkmrkkblmbrbkc4.xlarge
109958875511616721783
965C62FA71E7718D


CERT results:
No CERT results for M1569551


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 80000, B2 = 1380000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 20000, B2 = 300000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
261
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
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Last modified: 2024-02-29T14:28:04+00:00