lotus

previous page: 71 arithmetic/digits/prime/101.p
  
page up: Puzzles FAQ
  
next page: 73 arithmetic/digits/prime/change.one.p

72 arithmetic/digits/prime/all.prefix.p




Description

This article is from the Puzzles FAQ, by Chris Cole chris@questrel.questrel.com and Matthew Daly mwdaly@pobox.com with numerous contributions by others.

72 arithmetic/digits/prime/all.prefix.p


What is the longest prime whose every proper prefix is a prime?

arithmetic/digits/prime/all.prefix.s

23399339, 29399999, 37337999, 59393339, 73939133

 

Continue to:













TOP
previous page: 71 arithmetic/digits/prime/101.p
  
page up: Puzzles FAQ
  
next page: 73 arithmetic/digits/prime/change.one.p