is 2 1572929 - 1
has 473499 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-L61C753E8989C9E8Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26718.890868.6567 %500000150000000.08354.9769 %18.974470.2166 %
Target2610.195365.5738 %65003000000.00151.0523 %0.196765.9361 %
Difference+6+18.6955+3.0829 %+493500+14700000+0.0821+3.9245%+18.7776+4.2806 %

Known prime factors (2 factors, 156.5 bits, 0.00994981% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1572929240940815444624980627772374.3517658985734404572
22 × 3 × 166867 × 3824895343
2008-03-1416686738248953432,432.313.50725.208
157292953741437800784017031831912582.1521708323700586104555
5 × 15683 × 45139 × 482635303
2019-08-2645139482635303622,7021.70583.1808

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000300000--0.0022.397%
2016-03-17alpertronManual testing5000001500000012---8.721%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-10-25ANONYMOUSv4_computers212570.012
2003-08-08ANONYMOUSv4_computers212580.024


ECM factoring results:
Total ECM effort:31.260 GHz-days
Estimated T-Level:25.715
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.66418.942%
302500000.14386.682%
3510000000.01099.008%


ECM Summary

B1B2factorcurvesGHz-days
10.127
50000500000020611.53
500005000000422.351
250000400000005017.25


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07ANONYMOUSv4_computers61C753E8989C9E8B0.070


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-1
24094081544462498062777
551ECE9AA17B141E
2017-10-31kkmrkkblmbrbkc4.xlarge
24094081544462498062777
551ECE9AA17B141E
2019-08-27mnd925836
24094081544462498062777
5374143780078401703183191
B404059E9D9E91BD
2019-08-30GANKL-SCH05
24094081544462498062777
5374143780078401703183191
B404059E9D9E91BD


CERT results:
No CERT results for M1572929


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 300000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
260
270
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290
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Last modified: 2024-03-03T02:29:32+00:00