is 2 16455469 - 1
has 4953590 decimal digits
takes 8.998 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8891415706E8C8F9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2671.805764.1791%20500046637500.35514.7625%2.160965.8851%1.7060%
PrimeNet2650.443463.0769%7000022000000.14754.3357%0.590964.6778%1.6009%
GPU722697.255165.2174%11000030000000.21213.1854%7.467266.3254%1.1080%
Difference-2-5.4494-1.0383%+95000+1663750+0.1431+1.5770%-5.3063-0.4403%-0.4403%

Known prime factors (1 factor, 74.7 bits, 0.00045400% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16455469308361963682739839532412374.707936958903093980
22 × 32 × 5 × 13 × 83 × 4824214309
2017-03-26834824214309383.48208.39389.22

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-08-31T00:00:00ANONYMOUSv4_computers2050004663750---0.355--4.762%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-30T00:00:00ANONYMOUSv4_computers21265--0.443--
2014-03-21T21:24:00NesowaManual testing265266--0.454--
2014-08-28T08:08:00NesowaManual testing266267--0.908--


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)
2003-07-30T00:00:00ANONYMOUSv4_computers8891415706E8C8F98.998
2003-12-13T00:00:00ANONYMOUSv4_computers8891415706E8C8F98.998


PRP results:
No PRP results for M16455469


P-1 factor-bounds graph:
B1 = 205000, B2 = 4663750 (P-1 stage 2)
B1 = 205000 (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:
267
266
265
250
260
270
280
290
2100
Last modified: 2017-03-26T07:58:58+00:00