Return to main Number page
Prime numbers can be used for an exploring numbers type starter.
All prime numbers >3 are either one more or one less than a multiple of 6.
Proof : Primes 6k+1 6k-1 proof
For further ideas see these possibilities from Nrich. Two Primes Make One Square or Penta Primes for example could make suitable starters.
Try some of these ideas from Murderous Maths.
This application from Ptolemy.co.uk by Alec McEachran provides an excellent visualisation of the prime factorisation of a number. The author has written about the application in his own blog.
Enter your own number using this part of the display: