is 2 2455337 - 1
has 739131 decimal digits
takes 0.170 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA5E1008F3EFCE37Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.101867.1642%2382500857701000.69658.1874%12.798369.8526%2.6884%
PrimeNet2590.031362.7119%100001800000.00192.5293%0.033263.6550%0.9431%
GPU722630.650065.0794%100001600000.00181.3339%0.651865.5452%0.4658%
Difference+4+11.4517+2.0848%+2372500+85610100+0.6947+6.8535%+12.1465+4.3074%+4.3074%

Known prime factors (1 factor, 78.1 bits, 0.00317966% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24553373175456026817340066948572478.07164664362301739844
22 × 7 × 9240151 × 249935473
2015-07-10924015124993547345,0292.24822.5579

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.289%
2003-10-31T00:00:00Team Prime Ribv4_computers15000232500---0.003--0.921%
2010-12-22T11:37:00Jocelyn LaroucheManual testing2000020000---0.002--0.313%
2011-01-19T14:26:00Oscar Östlin950001947500---0.020--2.675%
2014-05-17T07:29:00mikrMSI238250085770100---0.697--8.187%
2018-09-28T17:00:42alpertronManual testing20000006000000012---0.519--7.633%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-07T00:00:00ANONYMOUSv4_computers21259--0.031--
2022-03-10T05:52:56LordJuliusManual testing21260--0.063--
2009-01-13T22:47:00Sturle Sundeginy.ifi260261--0.063--
2012-06-07T13:43:00Sebastian HornbostelManual testing261262--0.125--
2013-01-23T08:28:00dbaughManual testing262263--0.400--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.800--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.522--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.375 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.375 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.100
50000500000030.275


Lucas-Lehmer results:
No L-L results for M2455337


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T19:44:50Oliver KruseGTX-2D2B346D589C37A__no
2017-11-28T17:47:57kkmrkkblmbrbkc4.xlarge
317545602681734006694857
D2B346D589C37A__no


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 232500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-10T05:52:56+00:00