Truncatable Prime Pencil - pack of 10

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Brought to you by Maths Inspiration, this pencil is printed with the largest left-truncatable prime number 357686312646216567629137: this means it remains prime no matter how much you sharpen the pencil. A left-truncatable prime is a prime number that reminas prime even after you successvely remove its left most digit. These pencils come in a pack of 10 Watch James Grime explain more about truncatable prime numbers: Price = £10.97 Show more