ART

.


25

25 = 5 2 = 32 + 42

225 - 1 =  31 * 601 * 1801

1025 - 1 =  3 * 3 * 41 * 271 * 21401 * 25601 * 182521213001

24 - 25 - 26

Hellenica World - Scientific Library