| 2022-10-06 | francijezek | C-PRP | M1973857/90345774047126714121809 : C6F452AAB220A88D PRP proof power = 7 PRP: Verified PRP proof never uploaded |
| 2020-01-24 | Luigi Morelli | C-PRP | M1973857/90345774047126714121809 : C6F452AAB220A88D PRP: Verified PRP without proof (not generated) |
| 2020-01-23 | mnd9 | C-PRP | M1973857/90345774047126714121809 : C6F452AAB220A88D PRP: Verified PRP without proof (not generated) |
| 2020-01-21 | mnd9 | F-ECM | Factor: 90345774047126714121809 / (ECM curve 1, B1=50000, B2=5000000, Sigma=6530441283160322) |
| 2018-11-26 | Joss | NF-PM1 | B1=1973857, B2=246732125, E=12 |
| 2018-06-15 | ramgeis | NF | no factor from 2^70 to 2^71 |
| 2018-05-28 | Joss | NF-PM1 | B1=1973857, B2=197385700, E=12 |
| 2018-03-23 | Yxinity | NF | no factor from 2^69 to 2^70 |
| 2018-03-23 | Yxinity | NF | no factor from 2^68 to 2^69 |
| 2018-03-23 | Yxinity | NF | no factor from 2^67 to 2^68 |
| 2018-03-23 | Yxinity | NF | no factor from 2^66 to 2^67 |
| 2018-03-05 | Joss | NF-PM1 | B1=1973857, B2=120000000, E=12 |
| 2018-02-13 | Joss | NF-PM1 | B1=1973857, B2=60000000, E=12 |
| 2018-01-20 | Joss | NF-PM1 | B1=1973857, B2=30000000, E=12 |
| 2016-02-23 | Mark Rose | NF | no factor from 2^58 to 2^60 |
| 2016-02-23 | Mark Rose | NF | no factor from 2^62 to 2^63 |
| 2016-02-23 | Mark Rose | NF | no factor from 2^61 to 2^62 |
| 2015-09-10 | ramgeis | NF | no factor from 2^65 to 2^66 |
| 2015-06-27 | MadPoo | C-LL | 54312E12338FCDB9 |
| 2015-03-19 | lycorn | NF | no factor from 2^64 to 2^65 |
| 2015-03-19 | lycorn | NF | no factor from 2^63 to 2^64 |
| 2011-08-27 | GrunwalderGIMP | NF | no factor from 2^1 to 2^63 |
| 2011-03-19 | kurly | NF-PM1 | B1=1000000, B2=30000000, E=12 |
| 2009-12-28 | S485122 | NF | no factor from 2^60 to 2^61 |
