1062881
This number is a prime.
The natural numbers can be arranged into a list of ratios,
all of which are integers: (1+2)/3, (4+5+6+7+8+9+10+11)/12,
(13+14+15+...+36+37+38)/39, (40+41+42+...+118+119)/120....
The thirteenth of these ratios is the prime 1062881. [Caldwell]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell