is 2 1844537 - 1
has 555261 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L616587DB5E09A26Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.109168.6567 %500000150000000.10155.0734 %16.210670.2469 %
Target2610.166565.5738 %90007500000.00391.6300 %0.170466.1349 %
Difference+6+15.9426+3.0829 %+491000+14250000+0.0976+3.4434%+16.0402+4.1120 %

Known prime factors (2 factors, 124.8 bits, 0.00676651% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184453729510698467633500471961.356799948671879
3 × 7 × 359 × 106108061
2008-10-143591061080610.16650.45480.8494
1844537126422897788410473932063.4553426954780208
24 × 109 × 28277 × 69491
2015-08-2528277694910.86530.00240.0045

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-08-25alpertronManual testing500000150000001222063.4550.1018.872%


Trial Factoring results:
5758596061626364656667
No TF results for M1844537


ECM factoring results:
Total ECM effort:39.350 GHz-days
Estimated T-Level:25.710
DigitsB1CompleteFacMiss
201100014.9690.000%
25500001.67918.649%
302500000.14286.762%
3510000000.01099.030%


ECM Summary

B1B2factorcurvesGHz-days
10.103
500005000000332.281
50000660000021616.84
250000400000004720.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21ANONYMOUSv4_computers616587DB5E09A26E0.100


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-0
2951069846763350047
12642289778841047393
046A7ED8E3C5F9E4
2017-10-05Oliver KruseManual testing
2951069846763350047
12642289778841047393
046A7ED8E3C5F9E4
2017-11-11kkmrkkblmbrbkc4.xlarge
2951069846763350047
12642289778841047393
046A7ED8E3C5F9E4


CERT results:
No CERT results for M1844537


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
109
TF factor-bounds graph:
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
250
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270
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Last modified: 2024-03-03T02:29:32+00:00