is 2 2245739 - 1
has 676035 decimal digits
takes 0.148 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L51B4CC098127B924double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26713.231267.1642%500000150000000.12305.1949%13.354268.8700%1.7058%
PrimeNet2580.017162.0690%100001800000.00182.8739%0.018963.1591%1.0901%
GPU722620.273664.5161%110001900000.00201.6593%0.275565.1049%0.5888%
Difference+5+12.9577+2.6481%+489000+14810000+0.1210+3.5355%+13.0787+3.7650%+3.7650%

Known prime factors (1 factor, 62.1 bits, 0.00276584% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
224573949893310226745801431962.1141110843918789
3 × 11 × 193 × 367 × 475243
2008-12-243674752430.56390.00250.0046

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-04-03T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.282%
2016-04-29T20:51:12alpertronManual testing5000001500000012-
skipped known factor: 4989331022674580143
--0.123--5.195%


Trial Factoring results:
No TF results for M2245739


ECM factoring results:

Old Calculation Method

Total ECM effort:0.858 GHz-days
Estimated T-Level:0.500
DigitsB1CurvesCompleteFacMiss
201100010 / 1000.10090.438%
255000010 / 2800.03696.485%

New Calculation Method

Total ECM effort:0.858 GHz-days
Estimated T-Level:0.500
DigitsB1CompleteFacMiss
20110000.38568.071%
25500000.03696.504%
302500000.00299.776%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000100.858


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00ANONYMOUSv4_computers51B4CC098127B9240.148


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-10T11:30:20Oliver KruseGTX-1
4989331022674580143
62CA8D418BBD12__no
2017-11-29T15:37:43kkmrkkblmbrbkc4.xlarge
4989331022674580143
62CA8D418BBD12__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
250
260
270
280
290
2100
Last modified: 2022-07-11T00:55:02+00:00