Status update
Update:
4207: None [851k]
4329: 263133, 340355, 343403 [427k]
4347: 292512, 330224 [454k]
4431: 293087, 309253, 402299, 410231 [444k]
Reserving k= 1423 from n= 1M- n= 2M. Already tested to n= 1.25M primes: 1423*2^1205415- 1 (362, 870 digits)
Also unreserving k= 20055 tested up to 100k no new primes from last report.
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