The Planck Mass is the mass of the smallest possible black hole, named after Max Planck, and it happens to be 10 quadrillion times larger than the aforementioned Bosons.
The introduction of the quantum was spearheaded by Planck, who realized the energy of electromagnetic waves was always a multiple of a certain unit, which depended on the frequency of the waves, and Einstein noticed this very same unit in his photoelectric effect.
As Max Planck stated, "...in a synthesis of thought where there is an all around logical coherence, any alteration of one part of the structure is bound to upset other parts also...no alteration in a well built synthesis of thought can be effected unless strong pressure is brought [upon it] from the outside. This strong pressure must come from a well-constructed body of theory...".
Scientific opinion held weight back then, with Max Planck stating that "A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."