is 2 2100001 - 1
has 632164 decimal digits
takes 0.138 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9CDF105E9E9FE3B8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual271227.656269.0141%60000000180000000014.758211.0591%242.414572.4408%
Target2620.292664.5161%100001400000.00161.4513%0.294265.0311%
Difference+9+227.3637+4.4980%+59990000+1799860000+14.7566+9.6078%+242.1203+7.4097%

Known prime factors:
No known factors for M2100001

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-02-27ANONYMOUSv4_computers2048204800---0.001--0.115%
2009-07-15BigBrotherMiniluv2000005000000---0.044--2.358%
2012-02-10BloodIceMjolnir41000000010000000---0.953--3.858%
2012-02-16BloodIceMjolnir45000000050000000---4.767--5.871%
2021-06-06mognutsManual testing600000001800000000---14.76--11.059%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23Mark RoseManual testing21260--0.073--
2009-01-03Sturle Sundeothello.ifi260261--0.073--
2011-06-26Rob_Deetwopc261262--0.146--
2012-02-05BloodIceManual testing262263--0.467--
2012-02-05BloodIceManual testing263264--0.935--
2013-10-19David CampeauManual testing264265--1.779--
2014-03-08Never Odd Or EvenManual testing265266--3.558--
2014-03-08Never Odd Or EvenManual testing266267--7.117--
2014-03-08Never Odd Or EvenManual testing267268--14.23--
2014-03-08Never Odd Or EvenManual testing268269--28.47--
2014-03-08Never Odd Or EvenManual testing269270--56.94--
2015-12-23ramgeisManual testing270271--113.9--


ECM factoring results:
Total ECM effort:24.157 GHz-days
Estimated T-Level:25.318
DigitsB1CompleteFacMiss
201100010.8740.002%
25500001.00736.518%
302500000.06493.834%
3510000000.00399.702%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028123.91
766202417689010.245


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Jeff Mitchell9CDF105E9E9FE3B80.138
1999-02-07ANONYMOUSv4_computers9CDF105E9E9FE3B80.138
1999-03-15ANONYMOUSv4_computers9CDF105E9E9FE3B80.138
1999-04-02ANONYMOUSv4_computers9CDF105E9E9FE3B80.138
1999-04-13ANONYMOUSv4_computers9CDF105E9E9FE3B80.138
2017-09-19kkmrkkblmbrbkManual testing9CDF105E9E9FE3B80.138
2020-12-20-Anonymous-9CDF105E9E9FE3B80.138


PRP results:
No PRP results for M2100001


P-1 factor-bounds graph:
B1 = 60000000, B2 = 1800000000 (P-1 stage 2)
B1 = 60000000 (P-1 stage 1)
B1 = 50000000 (P-1 stage 1)
B1 = 10000000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
262
261
260
this exponent TF target: 62
TF double-checked to: 67.7
ECM T-Level=25.32 ~= 67-bit
250
260
270
280
Last modified: 2021-06-06T07:50:58+00:00