is 2 2477689 - 1
has 745859 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1366728B099457A7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26948.184768.1159%2382500857701000.69656.9421%48.881370.3294%2.2134%
PrimeNet2590.031062.7119%100001800000.00192.5336%0.032963.6566%0.9447%
GPU722630.644265.0794%110001600000.00191.3796%0.646165.5611%0.4818%
Difference+6+47.5406+3.0366%+2371500+85610100+0.6946+5.5626%+48.2352+4.7683%+4.7683%

Known prime factors:
No known factors for M2477689

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.189%
2003-10-31T00:00:00Team Prime Ribv4_computers15000228750---0.003--0.670%
2010-11-20T12:24:00Jocelyn LaroucheManual testing2000020000---0.002--0.220%
2011-01-21T01:07:00Oscar Östlin950001947500---0.020--2.107%
2014-09-02T00:10:00Jocelyn LaroucheManual testing120905120905---0.012--0.797%
2014-10-23T23:00:00mikrMSI238250085770100---0.697--6.942%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-08T00:00:00S00030v4_computers21258--0.015--
1999-05-02T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:15Mark RoseManual testing259260--0.031--
2009-01-14T05:40:00Sturle Sundehindemith.ifi260261--0.062--
2012-06-08T23:43:00Sebastian HornbostelManual testing261262--0.124--
2013-01-23T08:29:00dbaughManual testing262263--0.396--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.792--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.508--
2015-10-28T09:42:40ramgeisManual testing265266--3.016--
2017-07-22T20:28:36Gordon SpenceManual testing266267--6.032--
2019-05-27T13:36:57TJAOIManual testing267268--12.06--
2021-06-03T11:39:49TJAOIManual testing268269--24.13--


ECM factoring results:

Old Calculation Method

Total ECM effort:16.620 GHz-days
Estimated T-Level:22.857
DigitsB1CurvesCompleteFacMiss
2011000160 / 1001.60020.028%
2550000160 / 2800.57156.414%

New Calculation Method

Total ECM effort:16.620 GHz-days
Estimated T-Level:22.857
DigitsB1CompleteFacMiss
20110006.3750.170%
25500000.58455.780%
302500000.03796.406%
3510000000.00299.830%


ECM Summary

B1B2factorcurvesGHz-days
5000050000351.873
50000500000015314.05
50000605000070.700


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-21T00:00:00ANONYMOUSv4_computers1366728B099457A70.172
1999-01-29T00:00:00ANONYMOUSv4_computers1366728B099457A70.172
1999-05-30T00:00:00ANONYMOUSv4_computers1366728B099457A70.172


PRP results:
No PRP results for M2477689


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 120905 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (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
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
259
258
250
260
270
280
290
2100
Last modified: 2022-06-11T03:15:18+00:00