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Weakly prime numbers. Primes that having any one of their (base 10) digits changed to any other value will always result in a composite number. 294001, 505447, 584141, 604171, 971767, 1062599, 1282529, 1524181, 2017963, 2474431, 2690201, 3085553, 3326489, 4393139 ( OEIS : A050249 )
Meanwhile, perfect numbers are natural numbers that equal the sum of their positive proper divisors, which are divisors excluding the number itself. So, 6 is a perfect number because the proper divisors of 6 are 1, 2, and 3, and 1 + 2 + 3 = 6. There is a one-to-one correspondence between the Mersenne primes and the even perfect numbers.
Amazon.com, Inc., is an American electronic commerce and cloud computing company headquartered in Seattle, Washington. Founded by Jeff Bezos on July 5, 1994, as an online bookstore, Amazon went public after an initial public offering on May 15, 1997, during the midst of the dot-com bubble. [1] The funds gained from the IPO allowed Amazon to ...
Banana Boat Sport Ultra SPF 30 Sunscreen Spray Twin Pack. $13 $18 Save $5. For those who like to be active out in the sun, this one is a favorite among 10,000 Amazon shoppers. It protects your ...
6-Pack Plug-in Nightlights. $8 $10. Save $2 with Prime. If your house is too dark at night, help is here. Automatic sensors turn these LED cuties on when there's no more light. They're tiny but ...
Amazon will also hold “Coupon Parties,” which are limited time deals like save 20% when you buy $50 worth of Amazon brands. You can usually find these parties at the top of the Amazon coupons ...
Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...
Amazon said in 2023 the number of items sold by Chinese sellers on its site grew more than 20% year over year, while the number of Chinese merchants with sales upward of $10 million increased 30%.