OCR MEI C3 2008 January — Question 5

Exam BoardOCR MEI
ModuleC3 (Core Mathematics 3)
Year2008
SessionJanuary
TopicProof

5
  1. Verify the following statement: $$\text { ' } 2 ^ { p } - 1 \text { is a prime number for all prime numbers } p \text { less than } 11 \text { '. }$$
  2. Calculate \(23 \times 89\), and hence disprove this statement: $$\text { ' } 2 ^ { p } - 1 \text { is a prime number for all prime numbers } p ^ { \prime } \text {. }$$