is 2 3049153 - 1
has 917887 decimal digits
takes 0.260 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFE62DC1B4B28789Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.548067.6471%30000001000000001.02248.0348%20.570570.2465%2.5995%
PrimeNet2600.050463.3333%120002200000.00292.5227%0.053364.2583%0.9250%
GPU722641.167365.6250%140002200000.00311.4649%1.170466.1285%0.5035%
Difference+4+18.3807+2.0221%+2986000+99780000+1.0193+6.5699%+19.4000+4.1180%+4.1180%

Known prime factors (1 factor, 97.3 bits, 0.00319127% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
30491531959876050347099104334522737833097.30732138040471355473213947
31 × 3433 × 41651 × 136361 × 53170199
2017-09-20136361531701991.966e+100.37340.6677

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.249%
2010-10-04T01:30:00markrtiny1100002447500---0.029--2.665%
2016-03-14T18:46:39Squeeky_SquirrelP4_2600205000568875012---0.062--3.572%
2017-09-20T06:05:18mikrMSI3000000100000000123097.3071.0220.5192.0458.035%
2020-09-02T16:37:21Jocelyn LaroucheManual testing53666860983066---0.104--4.109%
2022-01-06T11:34:11Jocelyn LaroucheManual testing1473755116447100-
skipped known factor: 195987605034709910433452273783
--0.955--7.740%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-27T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-14T04:00:00Sturle Sundegonsha.ifi260261--0.050--
2010-11-13T16:20:00Sid & AndyBuzz261262--0.101--
2013-01-07T13:54:00dbaughManual testing262263--0.322--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.644--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.225--
2015-06-06T19:31:00ThaManual testing265266--2.451--
2021-02-18T11:47:37Jocelyn LaroucheManual testing265266--2.451--
2021-02-18T21:10:24Jocelyn LaroucheManual testing266267--4.902--
2017-05-07T02:13:04Gordon SpenceManual testing266267--4.902--
2021-02-26T11:49:43Jocelyn LaroucheManual testing267268--9.80--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.747 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.747 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.747


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00dennisv4_computersFE62DC1B4B28789D0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-28T08:36:25Oliver KruseGTX-0
195987605034709910433452273783
DA927EB2DB4A73__no
2017-12-11T00:04:58kkmrkkblmbrbkc4.xlarge
195987605034709910433452273783
DA927EB2DB4A73__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1473755, B2 = 116447100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1473755 (P-1 stage 1)
B1 = 536668, B2 = 6098306 (P-1 stage 2)
B1 = 536668 (P-1 stage 1)
B1 = 205000, B2 = 5688750 (P-1 stage 2)
B1 = 110000, B2 = 2447500 (P-1 stage 2)
B1 = 205000 (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: 2022-01-06T11:34:11+00:00