is 2 58020811 - 1
has 17466005 decimal digits
takes 122.972 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5503C163B98FD1B8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27465.939564.8649%685000181525005.02984.2265%70.969466.3498%
Target27332.968264.3836%400000130000003.33904.0775%36.307265.8358%
Difference+1+32.9713+0.4813%+285000+5152500+1.6909+0.1489%+34.6622+0.5140%

Known prime factors:
No known factors for M58020811

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2008-09-27Alexander DManual testing5050---0.000--0.000%
2008-10-04Alexander DManual testing10010000---0.002--0.000%
2011-02-04James HeinrichQ660068500018152500---5.030--4.226%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-12-08ANONYMOUSv4_computers21253--2.06809e-5--
1999-12-23ANONYMOUSv4_computers21253--2.06809e-5--
2000-02-09ANONYMOUSv4_computers21254--4.13618e-5--
2000-06-11ANONYMOUSv4_computers21256--0.000--
2001-07-07ANONYMOUSv4_computers21257--0.000--
2002-04-28ANONYMOUSv4_computers21258--0.001--
2003-07-30ANONYMOUSv4_computers21259--0.001--
2003-08-25mdrgv4_computers21261--0.005--
2008-10-30starrynteStarrynte-2263264--0.034--
2008-11-18Mikyav4_computers264265--0.064--
2008-11-18Mikyav4_computers265266--0.129--
2008-11-18Mikyav4_computers266267--0.258--
2008-11-18Mikyav4_computers267268--0.515--
2008-11-12Mikyav4_computers21269--2.058--
2008-11-18Mikyav4_computers268269--1.030--
2011-06-05TheJudgerManual testing269270--2.061--
2011-06-05TheJudgerManual testing270271--4.121--
2015-05-06monstManual testing271272--8.243--
2015-05-06monstManual testing272273--16.49--
2019-01-05ChuckManual testing273274--32.97--


ECM factoring results:
No ECM results for M58020811


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2012-06-20SWL551THOR5503C163B98FD1B8123.0
2021-07-30Ra1nb0wra1nb0w_5503C163B98FD1B8123.0


PRP results:
No PRP results for M58020811


P-1 factor-bounds graph:
B1 = 685000, B2 = 18152500 (P-1 stage 2)
B1 = 685000 (P-1 stage 1)
B1 = 100, B2 = 10000 (P-1 stage 2)
B1 = 100 (P-1 stage 1)
B1 = 50 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
274
273
272
271
270
269
268
267
266
265
264
261
259
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67.8
250
260
270
280
Last modified: 2023-04-26T21:34:10+00:00