Source: http://www.prothsearch.net/fermat.html
| 1732 | F5 | Euler |
| 123 year gap | ||
| 1855 | F6 | Clausen |
| 115 year gap | ||
| 1970 | F7 | Morrison & Brillhart |
| 10 year gap | ||
| 1980 | F8 | Brent & Pollard |
| 8 year gap | ||
| 1988 | F11 | Brent & Morain |
| 2 year gap | ||
| 1990 | F9 | Lenstra, Manasse & a larger team |
| 5 year gap | ||
| 1995 | F10 | Brent |
| 13 year gap... | ...and counting | |
| 2008 | (today) |
We are now in the third largest gap between Fermat number complete factorizations. The next milestone is the year 2110 when another 115 years will have again passed between complete factorizations. Will F12 (or greater) be factored before then?
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