Which one is the shortest phase during cell cycle?

The The M phase is the shortest phase during the cell cycle.
M phase is the period of actual nuclear and cell division during which the duplicated chromosomes are divided equally between two progeny cells.
Cell division occurs during M phase, which consists of nuclear division (mitosis) followed by cytoplasmic division (cytokinesis). It includes several stages: prophase, metaphase, anaphase and telophase. Cytokinesis is another process that runs during telophase and it leads to the splitting of the cytoplasm.