n!4+2 (n=1-20000)

Number Status Digits Program Time taken for proof
5!4+2 Prime 1 pfgw  
7!4+2 Prime 2 pfgw  
9!4+2 Prime 2 pfgw  
11!4+2 Prime 3 pfgw  
13!4+2 Prime 3 pfgw  
15!4+2 Prime 4 pfgw  
19!4+2 Prime 5 pfgw  
27!4+2 Prime 8 pfgw  
29!4+2 Prime 9 pfgw  
31!4+2 Prime 10 pfgw  
43!4+2 Prime 14 pfgw  
53!4+2 Prime 18 pfgw  
75!4+2 Prime 29 Primo 00.04s
143!4+2 Prime 63 Primo 00.06s
169!4+2 Prime 77 Primo 00.18s
185!4+2 Prime  86 Primo 00.23s
235!4+2 Prime  116 Primo 00.67s
259!4+2 Prime  130 Primo 00.69s
363!4+2 Prime 195 Primo 03.41s
365!4+2 Prime 196 Primo 06.47s
457!4+2 Prime 256 Primo 13.01s
493!4+2 Prime 280 Primo 24.46s
573!4+2 Prime 335 Primo 41.79s
777!4+2 Prime 479 Primo 02m 51s
1273!4+2 Prime 852 Primo 54m 59s
1275!4+2 Prime 854 Primo 44m 01s
1865!4+2 Prime 1325 Primo 242h 40mn 38s Ken Davis 06/2003
3621!4+2 Prime 2831 Primo 205 hrs 02mn 24s Ken Davis 10/2003
4523!4+2 prp 3645    
5291!4+2 prp 4353    
5845!4+2 prp 4872    
7185!4+2 prp 6149    
10183!4+2 prp 9100    
12845!4+2 prp 11802    PRP Records
15057!4+2 prp 14094    PRP Records
16281!4+2 prp 15378    PRP Records
17945!4+2 prp 17139    PRP Records
18771!4+2 prp 18019    PRP Records