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The Employer Identification Number (EIN), also known as the Federal Employer Identification Number (FEIN) or the Federal Tax Identification Number (FTIN), is a unique nine-digit number assigned by the Internal Revenue Service (IRS) to business entities operating in the United States for the purposes of identification.
Graphs of P(d) for initial digit d in various bases. [11] The dotted line shows P(d) were the distribution uniform. (In the SVG image, hover over a graph to show the value for each point.) An extension of Benford's law predicts the distribution of first digits in other bases besides decimal; in fact, any base b ≥ 2. The general form is [12]
The prefix (55) no longer has any relevance, but from the remainder of the fraction, the first 8 digits of the routing number (02120002) can be determined, and the check digit (the last digit, 5 in this example) can be calculated by using the check digit formula (thus giving 021200025).
Before an address can be certified as deliverable (CASS-certified), it must first be standardized. Standardization converts an address into a standard format by correcting the address, if possible, and adding missing information, such as a ZIP code, to produce a complete address containing a street address, city, state, and ZIP code.
To calculate the checksum, multiply the individual digits in the 10-digit identity number and 212121-212. The resulting products (a two digit product, such as 16, would be converted to 1 + 6) are added together. The checksum is the last digit of 10 minus the last digit in this sum (note that if the last digit of the sum is zero, the checksum is 0).
The word-safe Base32 alphabet is an extension of the Open Location Code Base20 alphabet. That alphabet uses 8 numeric digits and 12 case-sensitive letter digits chosen to avoid accidentally forming words. Treating the alphabet as case-sensitive produces a 32 (8+12+12) digit set.
The Hong Kong identity card (officially HKIC, [2] [3] commonly HKID) is an official identity document issued by the Immigration Department of Hong Kong. According to the Registration of Persons Ordinance (Cap. 177), all residents of age 11 or above who are living in Hong Kong for longer than 180 days must, within 30 days of either reaching the age of 11 or arriving in Hong Kong, register for ...
Verhoeff had the goal of finding a decimal code—one where the check digit is a single decimal digit—which detected all single-digit errors and all transpositions of adjacent digits. At the time, supposed proofs of the nonexistence [ 6 ] of these codes made base-11 codes popular, for example in the ISBN check digit .