What is the largest prime number that can be stored in 8 bit memory

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ash

  • Oct 13th, 2007
 

2^8=256

check the nearest prime no ie, 251

vtjar

  • Oct 2nd, 2010
 

There is 8 bit memory, so you can write it as 11111111 which is in binary
form convert it in decimal .that is 255.now take approx square root of 255 that
is 16.so take all prime nos. lower than 16. They are 3,5,7,11,13. Now you can
check that 251 is only the no which is prime because every nos. lower than 255
are divisible by all those prime nos.


So answer is: 251


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