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Quantity
1
Description
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...
Reviews
5.0
5 ratings
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Awesome quirky pencils
Easy transaction and great pencils for my number file loving husband.