is 2 2458451 - 1
has 740068 decimal digits
takes 0.171 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.086467.1642%2000000600000000.51907.6341%12.605469.6709%2.5067%
PrimeNet2590.031262.7119%100001800000.00192.5299%0.033263.6552%0.9434%
GPU722630.649265.0794%100001600000.00181.3343%0.651065.5453%0.4659%
Difference+4+11.4372+2.0848%+1990000+59840000+0.5171+6.2998%+11.9544+4.1256%+4.1256%

Known prime factors (2 factors, 117.2 bits, 0.00476645% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
245845154004378376316311652.2621098341565
3 × 5 × 73222771
-5732227710.00030.40120.7494
2458451348741420431559598092064.9197092706351104
211 × 32 × 11 × 43 × 97 × 8387
2018-02-27204883872.83730.00020.0004

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
245845118833563624479952145743553518311847936117.181
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-09-28T17:01:07alpertronManual testing20000006000000012-
skipped known factor: 34874142043155959809
--0.519--7.634%


Trial Factoring results:
No TF results for M2458451


ECM factoring results:

Old Calculation Method

Total ECM effort:0.367 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:0.367 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.183
50000500000020.183


Lucas-Lehmer results:
No L-L results for M2458451


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T21:39:56Oliver KruseGTX-1ECDE91CE48D450__no
2017-11-28T23:33:05kkmrkkblmbrbkc4.xlarge
5400437837631631
ECDE91CE48D450__no
2018-03-06T05:00:37Oliver KruseGTX-1
5400437837631631
34874142043155959809
ECDE91CE48D450__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2018-09-28T17:01:07+00:00