P-adic number, an Uncommon card

The card carries these facts from its Wikipedia article.

• For example, comparing the expansion of the rational number 1/5 in base 3 versus the 3-adic expansion, 1 5 = 0.
• 0121 ¯ = 0 ⋅ 3 0 + 0 ⋅ 3 − 1 + 1 ⋅ 3 − 2 + 2 ⋅ 3 − 3 + ⋯ 1 5 = 1210 ¯ 2 = ⋯ + 2 ⋅ 3 3 + 1 ⋅ 3 2 + 0 ⋅ 3 1 + 2 ⋅ 3 0. Formally, given a prime number p, a p-adic number can be defined as a series s = ∑ i = k ∞ a i p i = a k p k + a k + 1 p k + 1 + a k + 2 p k + 2 + ⋯ where k is an integer, and each a i is an integer such that

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The P-adic number article was read about 120,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 77 and blocks with 57: each hit it takes is cut by 23 %.

Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.

The cards just above and just below P-adic number in the power ranking, all domains together.