is 2 1825933 - 1
has 549661 decimal digits
takes 0.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L398DADE68CD239F2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.273368.6567 %500000150000000.10155.0672 %16.374870.2449 %
Target2610.168265.5738 %90007000000.00371.5939 %0.171966.1225 %
Difference+6+16.1050+3.0829 %+491000+14300000+0.0978+3.4733%+16.2029+4.1225 %

Known prime factors (1 factor, 64.3 bits, 0.00351894% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1825933219910965518719222012064.2546021879376700
22 × 52 × 11 × 5474435797
2008-09-292554744357971.949323.46243.821

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.862%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-16ANONYMOUSv4_computers212580.021


ECM factoring results:
Total ECM effort:38.959 GHz-days
Estimated T-Level:25.701
DigitsB1CompleteFacMiss
201100015.0510.000%
25500001.67418.747%
302500000.14086.922%
3510000000.01099.052%


ECM Summary

B1B2factorcurvesGHz-days
10.103
500005000000362.486
50000660000022017.13
250000400000004519.24


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers398DADE68CD239F20.099


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-0
21991096551871922201
5A9CFCF429915254
2017-11-06kkmrkkblmbrbkc4.xlarge
21991096551871922201
5A9CFCF429915254


CERT results:
No CERT results for M1825933


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00