Cryptocurrency Q&A
What is the easiest way to memorize prime numbers?
What is the easiest way to memorize prime numbers?
CherryBlossomPetal
Sat Aug 24 2024
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5 answers
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I'm curious, what's the simplest method for committing prime numbers to memory? Is there a trick or a technique that makes the process more straightforward and less daunting? I'm looking for a way to quickly recall these special numbers without having to rely on a calculator or a list. Could you share some insights on how to make memorizing prime numbers a breeze?
5 answers
CryptoNinja
Mon Aug 26 2024
One effective way to remember prime numbers up to 100 is to apply a simple rule of thumb. Start by discarding any number that does not end in 1, 3, 5, or 7, as these are the only possible last digits for prime numbers within this range. This initial step significantly narrows down the potential candidates.
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SophieJones
Mon Aug 26 2024
Another helpful tip is to eliminate any number whose digits sum up to a multiple of 3. Prime numbers are not divisible by 3, and thus, their digit sums cannot be divisible by 3 either. Applying this rule further reduces the pool of potential primes.
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EthereumEagleGuard
Sun Aug 25 2024
Additionally, it's crucial to keep in mind specific exceptions like 49, 77, and 91, which despite ending in 7, are not prime numbers. By excluding these numbers, you ensure your list of potential primes is more accurate.
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Elena
Sun Aug 25 2024
Following these steps, you will be left with a manageable list of prime numbers. For instance, between 10 and 100, you'll find 21 prime numbers. These include 23, 29, 31, 37, 41, 43, and 47, among others. Note that while some sequences may seem to follow a pattern, like 21%3 and 27%3 for 23 and 29, this is not a reliable method for identifying primes and should be avoided.
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Lorenzo
Sun Aug 25 2024
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