is 2 3072983 - 1
has 925061 decimal digits
takes 0.262 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3DE267488A9D70F9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27077.758568.5714%30000001000000001.02246.8237%78.781070.7160%2.1446%
PrimeNet2600.050063.3333%120002200000.00292.5263%0.052964.2596%0.9263%
GPU722641.158365.6250%140002200000.00311.4671%1.161466.1293%0.5043%
Difference+6+76.6003+2.9464%+2986000+99780000+1.0193+5.3566%+77.6196+4.5867%+4.5867%

Known prime factors:
No known factors for M3072983

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-14T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.162%
2010-09-21T06:21:00markrtiny1100002447500---0.029--2.105%
2016-10-23T04:55:26Squeeky_SquirrelP4_2600195000546000012---0.059--2.827%
2017-01-04T22:58:53Jocelyn Larouchelow 4M132000132000---0.016--0.759%
2018-01-30T19:22:44mikrMSI300000010000000012---1.022--6.824%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-01-13T00:00:00ANONYMOUSv4_computers21259--0.025--
2001-06-23T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T17:12:00Sturle Sundegoomba.ifi260261--0.050--
2011-10-27T20:23:00Sid & AndyBuzz261262--0.100--
2013-01-07T13:56:00dbaughManual testing262263--0.319--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.639--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.216--
2015-06-06T19:31:00ThaManual testing265266--2.432--
2017-05-14T00:43:38Gordon SpenceManual testing266267--4.864--
2022-02-17T11:55:35Jocelyn LaroucheManual testing267268--9.73--
2018-08-05T23:31:44ramgeisManual testing267268--9.73--
2021-03-23T11:34:13TJAOIManual testing268269--19.45--
2022-05-24T08:54:12mikrManual testing269270--38.91--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.657 GHz-days
Estimated T-Level:4.950
DigitsB1CurvesCompleteFacMiss
201100099 / 1000.99036.973%
255000099 / 2800.35470.173%

New Calculation Method

Total ECM effort:11.657 GHz-days
Estimated T-Level:4.950
DigitsB1CompleteFacMiss
20110003.8302.171%
25500000.35470.183%
302500000.02297.790%
3510000000.00199.896%


ECM Summary

B1B2factorcurvesGHz-days
50000480000070.802
500005000000859.91
50000675000070.942


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-01-21T00:00:00ANONYMOUSv4_computers3DE267488A9D70F90.262
1999-05-30T00:00:00ANONYMOUSv4_computers3DE267488A9D70F90.262


PRP results:
No PRP results for M3072983


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 195000, B2 = 5460000 (P-1 stage 2)
B1 = 110000, B2 = 2447500 (P-1 stage 2)
B1 = 195000 (P-1 stage 1)
B1 = 132000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-24T08:54:12+00:00