Tag Archives: Prime Numbers

17713

By A Maths Teacher | Published: 16/07/2013

Wednesday 17th July 2013 – another prime day! 17713 is prime as are all the individual components: 17, 7, 13 And it works in America too! Writing the month, day, year still yields a prime number 71713 It’s the last UK Prime Day until November (America get another prime day on 23 July – 72313) […]

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2 7 13

By A Maths Teacher | Published: 02/07/2013

Another Prime Day! It’s the 2nd July 2013 – 2 7 13 – which makes it another prime day! All the individual elements of the date: 2, 7 & 13, are prime numbers and 2713 is a prime number, too! And for our American readers … And for those of you in America who insist […]

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31513

By A Maths Teacher | Published: 31/05/2013
31 5 13 A Prime Day and a Palindromic Date

What a special day! The 31st May 2013, or, as we write in Europe, 31 5 13. And this is what makes it so special: Its a Palindromic Date 31 5 13 – the same forwards as it is backwards Its a Prime Day 31 5 13 – all the numbers in its date are […]

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Number 1 – Prime or Not

By A Maths Teacher | Published: 26/09/2012

The Number 1 – is it a prime number? So – we normally say, a prime number is a number that can only be divided by itself and 1. A good working definition that most children know, understand and readily accept. But … … but 1 is not a prime number. Why? Well, the true […]

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