is 2 16309589 - 1
has 4909676 decimal digits
takes 8.918 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4E6097079516CDC5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.821964.1791%18000021600000.22823.9650%2.050165.5994%1.4203%
PrimeNet2650.447363.0769%7000022000000.14754.3302%0.594864.6758%1.5988%
GPU722697.320065.2174%11000030000000.21213.1813%7.532166.3239%1.1066%
Difference-2-5.4982-1.0383%+70000-840000+0.0162+0.7837%-5.4820-0.7245%-0.7245%

Known prime factors (1 factor, 89.8 bits, 0.00055075% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1630958910962234651240834784033373592889.82533606716426884928811
3 × 11 × 31 × 67 × 223 × 2198724329177
2017-02-26223219872432917712,463,91794,980177,396

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-24T00:00:00ANONYMOUSv4_computers1800002160000---0.228--3.965%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24T00:00:00Mike Curtisv4_computers21261--0.019--
2002-01-08T00:00:00ANONYMOUSv4_computers21265--0.447--
2016-03-16T02:34:19Mark RoseManual testing265266--0.458--
2014-08-18T15:07:00NesowaManual testing266267--0.916--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.831 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.831


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-10-12T00:00:00ANONYMOUSv4_computers4E6097079516CDC58.918
2006-04-28T00:00:00ebravickv4_computers4E6097079516CDC58.918


PRP results:
No PRP results for M16309589


P-1 factor-bounds graph:
B1 = 180000, B2 = 2160000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
261
250
260
270
280
290
2100
Last modified: 2017-02-26T20:32:15+00:00