You are given a sentence in Portuguese. Your job is to translate the Portuguese sentence into Hebrew.

Let me give you an example: Afinal de contas elas é que decidem, e decidiram mesmo.
The answer to this example can be: אחרי הכל, הם החליטו, והם עשו,
Here is why: The Portugese sentence is correctly translated into Hebrew, because the meaning is preserved.

OK. solve this:
Lucas, uma vez mais, em 1876, mostrou-nos que (2 ^ 67) -1, com 21 algarismos de comprimento, não era um número primo.
Answer:
שוב לוקאס, ב-1876, הראה לנו ש- 1 - (67 ^ 2), בעל 27 ספרות, אינו ראשוני.