That's a very useful function; thank you Marco. However, I am still unsure what I may conclude when this does not give a result. e.g for the sequence 19683/78608, 2418947995203/8678312148800, 172687707/577158800, \
3191302184643/10179963963200, 13677256323/42329526800, \
9623043/29218112, 60507243/181584800, 4122657892323/12288566907200, \
16535178243/49105389200, 4298362362243/12742486356800
Are the numbers too large somehow?!
Cheers